{
  "schemaVersion": 1,
  "edition": 2026,
  "lastReviewedDate": "2026-10-03",
  "description": "Manufacturer-published specifications for tennis strings: material category, construction, cross-section shape, coating, gauges offered in millimetres and, where the maker publishes it, tension guidance. Each record is copied from the manufacturer's own product page on the access date shown. The catalog makes no feel, durability or tension-retention ratings.",
  "units": {
    "gauge": "millimetres as published by the manufacturer; an empty gaugesMm list means no millimetre diameter was published and gaugeNote explains",
    "tension": "lbs primary with the manufacturer's kg in brackets; tensionGuidanceLbs is present only when the manufacturer publishes guidance",
    "material": "String Tension AI app material category: polyester, multifilament, syntheticGut, naturalGut, polyamide or hybrid. Shaped olefin and polyethylene monofilaments are grouped with polyester."
  },
  "strings": [
    {
      "id": "babolat-addixion-plus",
      "brand": "Babolat",
      "model": "AddiXion+",
      "material": "multifilament",
      "construction": "Polyamide multifilament",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.25,
        1.3,
        1.35
      ],
      "source": {
        "publisher": "Babolat",
        "title": "Babolat AddiXion+ product page",
        "url": "https://www.babolat.com/us/addixion-12m/241151.html",
        "accessedDate": "2026-10-03",
        "quotedText": "The multifilament structure and soft polyamide material make AddiXion+ tennis strings extremely comfortable to play with. String Type: Multi Filaments. Composition: Polyamide. Gauge selector: 17 / 16 / 15L (variant codes JTR_125, JTR_130, JTR_135)."
      }
    },
    {
      "id": "babolat-rpm-blast",
      "brand": "Babolat",
      "model": "RPM Blast",
      "material": "polyester",
      "construction": "Co-polyester monofilament (high-density)",
      "shape": "Octagonal",
      "coating": null,
      "gaugesMm": [
        1.2,
        1.25,
        1.3,
        1.35
      ],
      "source": {
        "publisher": "Babolat",
        "title": "Babolat RPM Blast product page",
        "url": "https://www.babolat.com/us/rpm-blast-12m/241101.html",
        "accessedDate": "2026-10-03",
        "quotedText": "The octagonal structure with a high-density co-polyester adds a phenomenal rotation to the ball ... String Type: Polyester Mono Filament. Composition: Co-polyester. Gauge selector: 18 / 17 / 16 / 15L (variant codes JTR_120, JTR_125, JTR_130, JTR_135)."
      }
    },
    {
      "id": "babolat-rpm-hurricane",
      "brand": "Babolat",
      "model": "RPM Hurricane",
      "material": "polyester",
      "construction": "Co-polyester monofilament (high-density)",
      "shape": "Octagonal",
      "coating": null,
      "gaugesMm": [
        1.2,
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Babolat",
        "title": "Babolat RPM Hurricane product page",
        "url": "https://www.babolat.com/us/rpm-hurricane-12m/241141.html",
        "accessedDate": "2026-10-03",
        "quotedText": "The octagonal structure with a high-density co-polyester ... Co-polyester compound makes our RPM family very durable monofilaments. Composition: Co-polyester. Gauge selector: 18 / 17 / 16 (variant codes JTR_120, JTR_125, JTR_130)."
      }
    },
    {
      "id": "babolat-rpm-power",
      "brand": "Babolat",
      "model": "RPM Power",
      "material": "polyester",
      "construction": "Co-polyester monofilament with an additional coating",
      "shape": null,
      "coating": "Additional coating (type not specified)",
      "gaugesMm": [
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Babolat",
        "title": "Babolat RPM Power product page",
        "url": "https://www.babolat.com/us/rpm-power-12m/241139.html",
        "accessedDate": "2026-10-03",
        "quotedText": "A unique extrusion system gives an unprecedent power for a monofilament while keeping great spin. Special additional coating offers an exceptional \"crisp\" feel. String Type: Polyester Mono Filament. Composition: Co-polyester. Gauge selector: 17 / 16 (variant codes JTR_125, JTR_130)."
      }
    },
    {
      "id": "babolat-rpm-rough",
      "brand": "Babolat",
      "model": "RPM Rough",
      "material": "polyester",
      "construction": "Co-polyester monofilament (high-density) with a rough texture",
      "shape": "Octagonal, rough-textured surface",
      "coating": null,
      "gaugesMm": [
        1.25,
        1.3,
        1.35
      ],
      "source": {
        "publisher": "Babolat",
        "title": "Babolat RPM Rough product page",
        "url": "https://www.babolat.com/us/rpm-rough-12m/241140.html",
        "accessedDate": "2026-10-03",
        "quotedText": "The octagonal structure and rough high-density copolyester texture sets the ball whirling. String Type: Polyester Mono Filament. Composition: Co-polyester. Gauge selector: 17 / 16 / 15L (variant codes JTR_125, JTR_130, JTR_135)."
      }
    },
    {
      "id": "babolat-rpm-soft",
      "brand": "Babolat",
      "model": "RPM Soft",
      "material": "polyamide",
      "construction": "Polyamide monofilament",
      "shape": null,
      "coating": "Double coating with aramid",
      "gaugesMm": [
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Babolat",
        "title": "Babolat RPM Soft product page",
        "url": "https://www.babolat.com/us/rpm-soft-12m/241146.html",
        "accessedDate": "2026-10-03",
        "quotedText": "The new RPM SOFT polyamide monofilament is more durable than a multifilament and more comfortable than a polyester monofilament ... The double coating with aramide further increases its durability. Composition: Polyamide. Gauge selector: 17 / 16 (variant codes JTR_125, JTR_130)."
      }
    },
    {
      "id": "babolat-rpm-team",
      "brand": "Babolat",
      "model": "RPM Team",
      "material": "polyester",
      "construction": "Co-polyester monofilament (low-density)",
      "shape": "Octagonal",
      "coating": null,
      "gaugesMm": [
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Babolat",
        "title": "Babolat RPM Team product page",
        "url": "https://www.babolat.com/us/rpm-team-12m/241108.html",
        "accessedDate": "2026-10-03",
        "quotedText": "The octagonal structure with a low-density co-polyester adds a phenomenal rotation to the ball. String Type: Polyester Mono Filament. Composition: Co-polyester. Gauge selector: 17 / 16 (variant codes JTR_125, JTR_130)."
      }
    },
    {
      "id": "babolat-vs-touch",
      "brand": "Babolat",
      "model": "VS Touch",
      "material": "naturalGut",
      "construction": "Natural gut (twisted fibers)",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.25,
        1.3,
        1.35
      ],
      "source": {
        "publisher": "Babolat",
        "title": "Babolat VS Touch product page",
        "url": "https://www.babolat.com/us/touch-vs-12m/201031.html",
        "accessedDate": "2026-10-03",
        "quotedText": "The TOUCH VS characteristics (twisted fibers) ... String Type: Natural gut. Composition: Gut. Gauge selector: 17 / 16 / 15L (variant codes JTR_125, JTR_130, JTR_135)."
      }
    },
    {
      "id": "babolat-xalt",
      "brand": "Babolat",
      "model": "Xalt",
      "material": "multifilament",
      "construction": "Polyamide fibers in a multifilament matrix",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Babolat",
        "title": "Babolat Xalt product page",
        "url": "https://www.babolat.com/us/xalt-12m/241150.html",
        "accessedDate": "2026-10-03",
        "quotedText": "Its multifilaments matrix structure ensure a great vibrations absorption ... A reactive string with a firmer impact due to the specific polyamide fibers. String Type: Multi Filaments. Composition: Polyamide. Gauge selector: 17 / 16 (variant codes JTR_125, JTR_130)."
      }
    },
    {
      "id": "babolat-xcel",
      "brand": "Babolat",
      "model": "Xcel",
      "material": "multifilament",
      "construction": "Polyamide fibers twisted into a polyurethane matrix",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.25,
        1.3,
        1.35
      ],
      "source": {
        "publisher": "Babolat",
        "title": "Babolat Xcel product page",
        "url": "https://www.babolat.com/us/xcel-12m/241110.html",
        "accessedDate": "2026-10-03",
        "quotedText": "Polyamide fibers twisted into a polyurethane matrix deliver exceptional elasticity. String Type: Multi Filaments. Composition: Multifilament polyamide. Gauge selector: 17 / 16 / 15L (variant codes JTR_125, JTR_130, JTR_135)."
      }
    },
    {
      "id": "babolat-xplore",
      "brand": "Babolat",
      "model": "Xplore",
      "material": "multifilament",
      "construction": "100% polyamide filaments, matrix and sheath",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.25,
        1.3,
        1.35
      ],
      "source": {
        "publisher": "Babolat",
        "title": "Babolat Xplore product page",
        "url": "https://www.babolat.com/us/xplore-12m/241153.html",
        "accessedDate": "2026-10-03",
        "quotedText": "Made from polyamide multifilaments, this versatile tennis string enhances power while maintaining ball control. String Type: Multi Filaments. Composition: 100% Polyamide (filaments, matrix, and sheath). Gauge selector: 17 / 16 / 15L (variant codes JTR_125, JTR_130, JTR_135)."
      }
    },
    {
      "id": "dunlop-black-widow",
      "brand": "Dunlop",
      "model": "Black Widow",
      "material": "polyester",
      "construction": "High-tensile polyester monofilament",
      "shape": "Heptagonal",
      "coating": null,
      "gaugesMm": [
        1.33
      ],
      "source": {
        "publisher": "Dunlop",
        "title": "Dunlop Black Widow product page",
        "url": "https://us.dunlopsports.com/dunlop/tennis/strings/polyester/black-widow-string/BWS.html",
        "accessedDate": "2026-10-03",
        "quotedText": "Heptagonal profile bites into the ball to give exceptional spin generation. High tensile, mono-filament premium polyester for extra durability. Gauge: 16/1.33mm. Length: 40ft/12.2m."
      }
    },
    {
      "id": "dunlop-comfort-pro",
      "brand": "Dunlop",
      "model": "Comfort Pro",
      "material": "multifilament",
      "construction": "Multifilament core surrounded by thicker fibres",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.28,
        1.34
      ],
      "source": {
        "publisher": "Dunlop",
        "title": "Dunlop Comfort Pro product page",
        "url": "https://us.dunlopsports.com/dunlop/tennis/strings/multifilament/comfort-pro-string/CPS.html",
        "accessedDate": "2026-10-03",
        "quotedText": "A premium, multifilament core surrounded by thicker fibres. Gauge (MM/G): 1.34/16G - 1.28/17G."
      }
    },
    {
      "id": "dunlop-explosive",
      "brand": "Dunlop",
      "model": "Explosive",
      "material": "polyester",
      "construction": "Co-polyester monofilament",
      "shape": null,
      "coating": "Heat-treated outer coating",
      "gaugesMm": [
        1.25
      ],
      "gaugeNote": "A 16 gauge is also offered; its diameter was not published on the cited page.",
      "source": {
        "publisher": "Dunlop",
        "title": "Dunlop Explosive product page",
        "url": "https://us.dunlopsports.com/dunlop/tennis/strings/polyester/explosive-string/ETS.html",
        "accessedDate": "2026-10-03",
        "quotedText": "The Dunlop Explosive is a premium monofilament, co-polyester string ... Heat treated outer coating for enhanced durability. Gauge: 17/1.25mm. Length: 40ft/12.2m."
      }
    },
    {
      "id": "dunlop-silk-pro",
      "brand": "Dunlop",
      "model": "Silk Pro",
      "material": "multifilament",
      "construction": "Synthetic multifilament",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.27,
        1.32
      ],
      "source": {
        "publisher": "Dunlop",
        "title": "Dunlop Silk Pro product page",
        "url": "https://us.dunlopsports.com/dunlop/tennis/strings/multifilament/silk-pro-string/SSP.html",
        "accessedDate": "2026-10-03",
        "quotedText": "In a synthetic multifilament construction. Gauge (MM/G): 1.32/16G - 1.27/17G."
      }
    },
    {
      "id": "dunlop-silk-spin",
      "brand": "Dunlop",
      "model": "Silk Spin",
      "material": "multifilament",
      "construction": "Compressed microfiber core with monofilament outer wraps",
      "shape": "Hexagonal",
      "coating": "Thermo-elastic PU bonded outer coating",
      "gaugesMm": [
        1.3
      ],
      "gaugeNote": "A 17 gauge is also listed; its diameter was not published on the cited page.",
      "source": {
        "publisher": "Dunlop",
        "title": "Dunlop Silk Spin product page",
        "url": "https://us.dunlopsports.com/dunlop/tennis/strings/multifilament/silk-spin-string/SSTS.html",
        "accessedDate": "2026-10-03",
        "quotedText": "Compressed microfiber central core. Durable monofilament outer wraps. Thermo elastic PU bonded outer coating with Hexagonal profile. Gauge: 16/1.30mm."
      }
    },
    {
      "id": "gamma-gamma-gut",
      "brand": "Gamma",
      "model": "Gamma Gut",
      "material": "multifilament",
      "construction": "Dual centre core with outer filaments bonded in a polyurethane matrix (synthetic, not natural gut)",
      "shape": null,
      "coating": "Abrasion-resistant TPU coating",
      "gaugesMm": [
        1.27,
        1.32
      ],
      "source": {
        "publisher": "Gamma",
        "title": "Gamma Gamma Gut product page",
        "url": "https://gammasports.com/products/gamma-gut",
        "accessedDate": "2026-10-03",
        "quotedText": "GAMMA Gut's TNT processed high-energy dual center core ... The outer filaments are twisted and bonded together in a polyurethane matrix. Abrasion-resistant TPU coating resists notching. Multifilament Construction. Gauges: 16 (1.32mm), 17 (1.27mm)."
      }
    },
    {
      "id": "gamma-sapphire",
      "brand": "Gamma",
      "model": "Sapphire",
      "material": "polyester",
      "construction": "AMP co-polyester monofilament",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.23,
        1.28
      ],
      "source": {
        "publisher": "Gamma",
        "title": "Gamma Sapphire product page",
        "url": "https://gammasports.com/products/gamma-sapphire-tennis-string",
        "accessedDate": "2026-10-03",
        "quotedText": "AMP Copolyester Technology. Gauges: 16 (1.28 mm), 17 (1.23 mm). Set Length: 40'."
      }
    },
    {
      "id": "gamma-tnt2-fat-core-xl",
      "brand": "Gamma",
      "model": "TNT2 Fat Core XL",
      "material": "syntheticGut",
      "construction": "Solid synthetic core (15% larger) with an outer wrap containing wear-resistant microfibers",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.27,
        1.32
      ],
      "source": {
        "publisher": "Gamma",
        "title": "Gamma TNT2 Fat Core XL product page",
        "url": "https://gammasports.com/products/gamma-tnt2-fat-core-xl",
        "accessedDate": "2026-10-03",
        "quotedText": "TNT2 Fat Core XL features a high tenacity synthetic core that is 15% larger ... wear-resistant microfibers are added to the outwrap to resist notching. GAMMA TNT Premium Synthetic Series. 16 gauge - 1.32 mm. 17 gauge - 1.27mm."
      }
    },
    {
      "id": "gamma-tnt2-react-pro",
      "brand": "Gamma",
      "model": "TNT2 React Pro",
      "material": "syntheticGut",
      "construction": "Large solid centre core with an outer wrap containing PEEK microfibers",
      "shape": null,
      "coating": "Low-friction coating (type not specified)",
      "gaugesMm": [
        1.27,
        1.32
      ],
      "source": {
        "publisher": "Gamma",
        "title": "Gamma TNT2 React Pro product page",
        "url": "https://gammasports.com/products/gamma-tnt2-react-pro",
        "accessedDate": "2026-10-03",
        "quotedText": "New proprietary low friction coating. Wear resistance peek fibers within the outer wrap. Large center core. Gauge: 16 Gauge (1.32mm) or 17 Gauge (1.27mm). Set Length: 40 feet (12.2 m)."
      }
    },
    {
      "id": "gamma-verve-soft",
      "brand": "Gamma",
      "model": "Verve Soft",
      "material": "polyester",
      "construction": "Co-extruded AMP co-polyester: soft core with stiffer co-polyester prongs",
      "shape": "Three protruding prongs",
      "coating": null,
      "gaugesMm": [
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Gamma",
        "title": "Gamma Verve Soft product page",
        "url": "https://gammasports.com/products/gamma-verve-soft",
        "accessedDate": "2026-10-03",
        "quotedText": "This AMP co-polyester string uses a co-extrusion build to combine stiff and soft materials ... Three prongs protrude out of the main string core. These prongs are made from a slightly stiffer co-polyester material. 16 gauge - 1.30mm. 17 gauge - 1.25mm."
      }
    },
    {
      "id": "head-hawk",
      "brand": "Head",
      "model": "Hawk",
      "material": "polyester",
      "construction": "Co-polyester monofilament (Crystal Core heat treatment)",
      "shape": "Round",
      "coating": null,
      "gaugesMm": [
        1.2,
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Head",
        "title": "Head Hawk product page",
        "url": "https://www.head.com/en_GB/product/hawk-set-281103",
        "accessedDate": "2026-10-03",
        "quotedText": "This monofilament string's inner crystalline core ... and the outer molecular chains ... are balanced thanks to the Crystal Core Technology. Gauge: 1.20 mm / 18 g, 1.25 mm / 17 g, 1.30 mm / 16 g ... heat treatment of co-polyester strings. Shape: Round."
      }
    },
    {
      "id": "head-hawk-touch",
      "brand": "Head",
      "model": "Hawk Touch",
      "material": "polyester",
      "construction": "Co-polyester monofilament (Crystal Core heat treatment)",
      "shape": "Round",
      "coating": null,
      "gaugesMm": [
        1.15,
        1.2,
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Head",
        "title": "Head Hawk Touch product page",
        "url": "https://www.head.com/en_GB/product/hawk-touch-3",
        "accessedDate": "2026-10-03",
        "quotedText": "The HAWK TOUCH monofilament string features a bigger crystalline inner core ... Gauge: 1.15 mm / 19 g, 1.20 mm / 18 g, 1.25 mm / 17 g, 1.30 mm / 16 g ... Crystal Core Technology ... heat treatment of co-polyester strings. Construction: Monofilament. Shape: Round."
      }
    },
    {
      "id": "head-hawk-touch-rough",
      "brand": "Head",
      "model": "Hawk Touch Rough",
      "material": "polyester",
      "construction": "Co-polyester monofilament (Crystal Core heat treatment) with a rougher surface",
      "shape": "Edged/shaped, rougher surface",
      "coating": null,
      "gaugesMm": [
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Head",
        "title": "Head Hawk Touch Rough product page",
        "url": "https://www.head.com/en_GB/product/hawk-touch-rough-set-281035",
        "accessedDate": "2026-10-03",
        "quotedText": "The HAWK TOUCH ROUGH ... has a rougher surface that provides more bite and increases the spin on the ball. Gauge: 1.25 mm / 17 g, 1.30 mm / 16 g ... heat treatment of co-polyester strings. Construction: Monofilament. Shape: Edged/Shaped."
      }
    },
    {
      "id": "head-hawk-tour-rpet",
      "brand": "Head",
      "model": "Hawk Tour rPET",
      "material": "polyester",
      "construction": "Recycled-PET co-polyester monofilament",
      "shape": "7-sided (edged/shaped)",
      "coating": null,
      "gaugesMm": [
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Head",
        "title": "Head Hawk Tour rPET product page",
        "url": "https://www.head.com/en_GB/product/hawk-tour-rpet-281125",
        "accessedDate": "2026-10-03",
        "quotedText": "Created from recycled PET materials, the HAWK TOUR RPET is an advanced co-polyester tennis string with a 7-sided structure. Gauge: 1.25 mm / 17 g, 1.30 mm / 16 g. Construction: Monofilament. Shape: Edged/Shaped."
      }
    },
    {
      "id": "head-lynx-power",
      "brand": "Head",
      "model": "Lynx Power",
      "material": "polyester",
      "construction": "Co-polyester monofilament",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.2,
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Head",
        "title": "Head Lynx Power product page",
        "url": "https://www.head.com/en_GB/product/lynx-power-281066",
        "accessedDate": "2026-10-03",
        "quotedText": "Made with a specially formulated co-polyester material ... High-performance co-polyester tennis string. Gauge: 1.20 mm / 18 g, 1.25 mm / 17 g, 1.30mm / 16 g."
      }
    },
    {
      "id": "head-lynx-touch",
      "brand": "Head",
      "model": "Lynx Touch",
      "material": "polyester",
      "construction": "Co-polyester monofilament",
      "shape": "Round",
      "coating": null,
      "gaugesMm": [
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Head",
        "title": "Head Lynx Touch product page",
        "url": "https://www.head.com/en_GB/product/lynx-touch-281042",
        "accessedDate": "2026-10-03",
        "quotedText": "The construction of the co-polyester monofilament strings allows for excellent playability. Gauge: 1.25 mm / 17 g, 1.30 mm / 16 g. Construction: Monofilament. Shape: Round."
      }
    },
    {
      "id": "head-lynx-tour",
      "brand": "Head",
      "model": "Lynx Tour",
      "material": "polyester",
      "construction": "Co-polymer monofilament",
      "shape": "6-edge (edged/shaped)",
      "coating": null,
      "gaugesMm": [
        1.2,
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Head",
        "title": "Head Lynx Tour product page",
        "url": "https://www.head.com/en_GB/product/lynx-tour-4",
        "accessedDate": "2026-10-03",
        "quotedText": "The unique 6-edge design of this co-polyester ... A monofilament made out of a new co-polymer mixture. Gauge: 1.20 mm / 18 g, 1.25 mm / 17 g, 1.30 mm / 16 g. Shape: Edged/Shaped."
      }
    },
    {
      "id": "head-reflex-mlt",
      "brand": "Head",
      "model": "Reflex MLT",
      "material": "multifilament",
      "construction": "100% nylon multifilament with PU resin",
      "shape": "Round",
      "coating": "Low-friction coating",
      "gaugesMm": [
        1.25,
        1.3,
        1.35,
        1.4
      ],
      "source": {
        "publisher": "Head",
        "title": "Head Reflex MLT product page",
        "url": "https://www.head.com/en_GB/product/reflex-mlt-2",
        "accessedDate": "2026-10-03",
        "quotedText": "Thanks to its special 100% nylon multifilament construction the string provides extra control while the unique PU resin delivers a comfortable feeling ... A special low friction coating makes sure the strings perfectly re-align after every shot. Gauge: 1.25 mm / 17 g, 1.30 mm / 16 g, 1.35 mm / 15L g, 1.40 mm / 15 g. Shape: Round."
      }
    },
    {
      "id": "head-rip-control",
      "brand": "Head",
      "model": "RIP Control",
      "material": "multifilament",
      "construction": "Multifilament core wrapped with polyolefin ribbons (RIP)",
      "shape": "Round",
      "coating": null,
      "gaugesMm": [
        1.2,
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Head",
        "title": "Head RIP Control product page",
        "url": "https://www.head.com/en_GB/product/rip-control-12",
        "accessedDate": "2026-10-03",
        "quotedText": "The RIP CONTROL is a well-blended easy-to-handle multifilament string ... RIP: Ribbons are flat tapes made of polyolefine, and are wound several layers thick ... combined with a multifilament core. Gauge: 1.20 mm / 18 g, 1.25 mm / 17 g, 1.30 mm / 16 g. Shape: Round."
      }
    },
    {
      "id": "head-synthetic-gut",
      "brand": "Head",
      "model": "Synthetic Gut",
      "material": "syntheticGut",
      "construction": "Solid core with a soft multifilament outer wrap",
      "shape": "Round",
      "coating": "Low-friction coating",
      "gaugesMm": [
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Head",
        "title": "Head Synthetic Gut product page",
        "url": "https://www.head.com/en_GB/product/synthetic-gut-281111",
        "accessedDate": "2026-10-03",
        "quotedText": "The New Synthetic Gut features a solid core and a soft multifilament outer wrap as well as a low-friction coating. Gauge: 1.25 mm / 17 g, 1.30 mm / 16 g. Shape: Round."
      }
    },
    {
      "id": "head-velocity-mlt",
      "brand": "Head",
      "model": "Velocity MLT",
      "material": "multifilament",
      "construction": "Multifilament core surrounded by thicker filaments",
      "shape": "Round",
      "coating": "Low-friction coating",
      "gaugesMm": [
        1.25,
        1.3,
        1.35,
        1.4
      ],
      "source": {
        "publisher": "Head",
        "title": "Head Velocity MLT product page",
        "url": "https://www.head.com/en_GB/product/velocity-mlt-4",
        "accessedDate": "2026-10-03",
        "quotedText": "Its multifilament core is surrounded by thicker filaments ... the low friction coating makes sure that the strings re-align after every shot. Gauge: 1.25 mm / 17g, 1.30 mm / 16g, 1.35 mm / 15L, 1.40 mm / 15g. Construction: Multifilament. Shape: Round."
      }
    },
    {
      "id": "head-velocity-mlt-power",
      "brand": "Head",
      "model": "Velocity MLT Power",
      "material": "multifilament",
      "construction": "Multifilament core surrounded by slightly thicker filaments",
      "shape": "Round",
      "coating": "Low-friction coating",
      "gaugesMm": [
        1.25,
        1.3,
        1.35,
        1.4
      ],
      "source": {
        "publisher": "Head",
        "title": "Head Velocity MLT Power product page",
        "url": "https://www.head.com/en_GB/product/velocity-mlt-power-set-281613",
        "accessedDate": "2026-10-03",
        "quotedText": "Slightly thicker filaments around the multifilament core enhance the energy efficiency ... VELOCITY MLT POWER has a low friction coating. Gauge: 1.25 mm / 17g, 1.30 mm / 16g, 1.35 mm / 15L, 1.40 mm / 15g. Construction: Multifilament. Shape: Round."
      }
    },
    {
      "id": "kirschbaum-black-shark",
      "brand": "Kirschbaum",
      "model": "Black Shark",
      "material": "polyester",
      "construction": "Co-polyester monofilament",
      "shape": "Octagonal (eight-edged star profile)",
      "coating": null,
      "gaugesMm": [
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Kirschbaum",
        "title": "Kirschbaum Black Shark product page",
        "url": "https://kirschbaum-strings.com/en/products/black-shark-set",
        "accessedDate": "2026-10-03",
        "quotedText": "This monofilament co-polyester string has a unique star-shaped profile with eight edges ... Available in black and in diameters of 1.25 mm and 1.30 mm."
      }
    },
    {
      "id": "kirschbaum-max-power",
      "brand": "Kirschbaum",
      "model": "Max Power",
      "material": "polyester",
      "construction": "Co-polyester monofilament",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.2,
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Kirschbaum",
        "title": "Kirschbaum Max Power product page",
        "url": "https://kirschbaum-strings.com/en/products/max-power-set",
        "accessedDate": "2026-10-03",
        "quotedText": "This monofilament high-end co-polyester string offers maximum acceleration and a short reaction time ... Available in red, white and anthracite, and in diameters of 1.20 mm, 1.25 mm and 1.30 mm."
      }
    },
    {
      "id": "kirschbaum-max-power-rough",
      "brand": "Kirschbaum",
      "model": "Max Power Rough",
      "material": "polyester",
      "construction": "Co-polyester monofilament, profiled version of Max Power",
      "shape": "Textured (profiled)",
      "coating": null,
      "gaugesMm": [
        1.2,
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Kirschbaum",
        "title": "Kirschbaum Max Power Rough product page",
        "url": "https://kirschbaum-strings.com/en/products/max-power-rough-set",
        "accessedDate": "2026-10-03",
        "quotedText": "This monofilament high-end co-polyester string ... It is particularly \"snappy\" in the profiled version. Available in anthracite and in diameters of 1.20 mm, 1.25 mm and 1.30 mm."
      }
    },
    {
      "id": "kirschbaum-pro-line-rough",
      "brand": "Kirschbaum",
      "model": "Pro Line Rough",
      "material": "polyester",
      "construction": "Co-polyester monofilament with a groove surface profile",
      "shape": "Textured (grooved)",
      "coating": null,
      "gaugesMm": [
        1.2,
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Kirschbaum",
        "title": "Kirschbaum Pro Line Rough product page",
        "url": "https://kirschbaum-strings.com/en/products/pro-line-rough-set",
        "accessedDate": "2026-10-03",
        "quotedText": "The Pro Line Rough is a monofilament co-polyester string with a unique surface profile ... With its special groove profile ... Available in black and in diameters of 1.20 mm, 1.25 mm and 1.30 mm."
      }
    },
    {
      "id": "kirschbaum-pro-tour-control",
      "brand": "Kirschbaum",
      "model": "Pro Tour Control",
      "material": "polyester",
      "construction": "Co-polyester monofilament",
      "shape": "Pentagonal (5-edge)",
      "coating": null,
      "gaugesMm": [
        1.13,
        1.18,
        1.23,
        1.28,
        1.33
      ],
      "source": {
        "publisher": "Kirschbaum",
        "title": "Kirschbaum Pro Tour Control product page",
        "url": "https://kirschbaum-strings.com/en/products/pro-tour-control-set",
        "accessedDate": "2026-10-03",
        "quotedText": "The PRO TOUR CONTROL string of the latest CO-polyester generation impresses with an innovative 5-edge profile ... Available in light silver and in diameters from 1.13 mm to 1.33 mm. Variant options: 1.13mm, 1.18mm, 1.23mm, 1.28mm, 1.33mm."
      }
    },
    {
      "id": "kirschbaum-synthetic-gut",
      "brand": "Kirschbaum",
      "model": "Synthetic Gut",
      "material": "syntheticGut",
      "construction": "Polyamide (nylon) synthetic gut",
      "shape": "Round",
      "coating": null,
      "gaugesMm": [
        1.25,
        1.3,
        1.35
      ],
      "source": {
        "publisher": "Kirschbaum",
        "title": "Kirschbaum Synthetic Gut product page",
        "url": "https://kirschbaum-strings.com/en/products/synthetic-gut-reel",
        "accessedDate": "2026-10-03",
        "quotedText": "The Synthetic Gut is the classic polyamide string ... Available in natural color and in diameters of 1.25 mm, 1.30 mm and 1.35 mm."
      }
    },
    {
      "id": "kirschbaum-touch-multifibre",
      "brand": "Kirschbaum",
      "model": "Touch Multifibre",
      "material": "multifilament",
      "construction": "Polyamide multifilament core with stranding and PU cover",
      "shape": "Round",
      "coating": "PU cover",
      "gaugesMm": [
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Kirschbaum",
        "title": "Kirschbaum Touch Multifibre product page",
        "url": "https://kirschbaum-strings.com/en/products/touch-multifibre-set",
        "accessedDate": "2026-10-03",
        "quotedText": "The Touch Multifibre tennis string combines a multifilament polyamide core with stranding and PU cover ... Available in natural color and in diameters of 1.25 mm and 1.30 mm."
      }
    },
    {
      "id": "kirschbaum-xplosive-speed",
      "brand": "Kirschbaum",
      "model": "Xplosive Speed",
      "material": "polyester",
      "construction": "Soft polyester monofilament",
      "shape": "Pentagonal (light 5-edge)",
      "coating": null,
      "gaugesMm": [
        1.13,
        1.18,
        1.23,
        1.28,
        1.33
      ],
      "source": {
        "publisher": "Kirschbaum",
        "title": "Kirschbaum Xplosive Speed product page",
        "url": "https://kirschbaum-strings.com/en/products/xplosive-speed-set",
        "accessedDate": "2026-10-03",
        "quotedText": "The Xplosive Speed is a soft polyester string of the latest generation with a light 5-edge profile ... Available in black and in diameters from 1.13 mm to 1.33 mm at 12 m length. Variant options: 1.13mm, 1.18mm, 1.23mm, 1.28mm, 1.33mm."
      }
    },
    {
      "id": "luxilon-4g",
      "brand": "Luxilon",
      "model": "4G",
      "material": "polyester",
      "construction": "Poly-ether-ether monofilament with aligned molecular chains",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Luxilon",
        "title": "Luxilon 4G product page",
        "url": "https://www.luxilon.com/en-us/product/4g-125-set-rz99710",
        "accessedDate": "2026-10-03",
        "quotedText": "Molecular chains are strategically aligned to minimize tension loss over time and it's poly-ether-ether materials enhance strength and flexibility. Specs: Gauge 17, mm 1.25; 130 page (rz99712): mm 1.3."
      }
    },
    {
      "id": "luxilon-4g-rough",
      "brand": "Luxilon",
      "model": "4G Rough",
      "material": "polyester",
      "construction": "4G poly-ether-ether monofilament, dented while still soft",
      "shape": "Textured (dented surface)",
      "coating": null,
      "gaugesMm": [
        1.25
      ],
      "source": {
        "publisher": "Luxilon",
        "title": "Luxilon 4G Rough product page",
        "url": "https://www.luxilon.com/en-us/product/4g-rough-125-set-rz99713",
        "accessedDate": "2026-10-03",
        "quotedText": "4G Rough 125 is a textured version of 4G ... By denting the string while it is still soft, Luxilon maintains the structural integrity and benefits of 4G string. Specs: Gauge 17, mm 1.25."
      }
    },
    {
      "id": "luxilon-4g-soft",
      "brand": "Luxilon",
      "model": "4G Soft",
      "material": "polyester",
      "construction": "Softer 4G poly-ether-ether monofilament",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.25
      ],
      "source": {
        "publisher": "Luxilon",
        "title": "Luxilon 4G Soft product page",
        "url": "https://www.luxilon.com/en-us/product/4g-soft-125-set-rz99711",
        "accessedDate": "2026-10-03",
        "quotedText": "While it is over 10% softer than 4G, this string still maintains solid firmness and durability ... it's poly-ether-ether materials enhance strength and flexibility. Specs: Gauge 17, mm 1.25."
      }
    },
    {
      "id": "luxilon-alu-power",
      "brand": "Luxilon",
      "model": "ALU Power",
      "material": "polyester",
      "construction": "Poly-ether-ether monofilament containing aluminum",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.15,
        1.2,
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Luxilon",
        "title": "Luxilon ALU Power product page",
        "url": "https://www.luxilon.com/en-us/product/alu-power-125-set-rz99203",
        "accessedDate": "2026-10-03",
        "quotedText": "The aluminum present in the string enhances playability ... Its unique poly-ether-ether composition. Specs: Gauge 17, mm 1.25; other set pages: wr8302000 mm 1.15, rz99880 mm 1.20, wr8302200 mm 1.30."
      }
    },
    {
      "id": "luxilon-alu-power-rough",
      "brand": "Luxilon",
      "model": "ALU Power Rough",
      "material": "polyester",
      "construction": "ALU Power material with a dented, textured surface",
      "shape": "Textured (dented surface)",
      "coating": null,
      "gaugesMm": [
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Luxilon",
        "title": "Luxilon ALU Power Rough product page",
        "url": "https://www.luxilon.com/en-us/product/alu-power-rough-125-set-rz99520",
        "accessedDate": "2026-10-03",
        "quotedText": "ALU Power Rough uses a textured surface to generate additional spin ... Its dented surface also provides more string flex ... This string contains the same material composition as the ALU Power collection. Specs: Gauge 17, mm 1.25; 130 page (wr8302700): mm 1.30."
      }
    },
    {
      "id": "luxilon-alu-power-soft",
      "brand": "Luxilon",
      "model": "ALU Power Soft",
      "material": "polyester",
      "construction": "Softer version of the ALU Power monofilament",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.25
      ],
      "source": {
        "publisher": "Luxilon",
        "title": "Luxilon ALU Power Soft product page",
        "url": "https://www.luxilon.com/en-us/product/alu-power-soft-125-set-rz99102",
        "accessedDate": "2026-10-03",
        "quotedText": "Another string in the iconic ALU Power line, ALU Power Soft is widely appealing because its soft texture increases arm comfort. Specs: Gauge 17, mm 1.25."
      }
    },
    {
      "id": "luxilon-alu-power-spin",
      "brand": "Luxilon",
      "model": "ALU Power Spin",
      "material": "polyester",
      "construction": "Shaped version of ALU Power using the same materials",
      "shape": "Pentagonal",
      "coating": null,
      "gaugesMm": [
        1.27
      ],
      "source": {
        "publisher": "Luxilon",
        "title": "Luxilon ALU Power Spin product page",
        "url": "https://www.luxilon.com/en-us/product/alu-power-spin-127-set-rz99840",
        "accessedDate": "2026-10-03",
        "quotedText": "Featuring a pentagonal shape for enhanced spin potential ... This string is the shaped version of ALU Power ... It contains the same championship-worthy materials as ALU Power. Specs: Gauge 16L, mm 1.27."
      }
    },
    {
      "id": "luxilon-big-banger-original",
      "brand": "Luxilon",
      "model": "Big Banger Original",
      "material": "polyester",
      "construction": "Poly-ether-ether blend monofilament",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.3
      ],
      "source": {
        "publisher": "Luxilon",
        "title": "Luxilon Big Banger Original product page",
        "url": "https://www.luxilon.com/en-us/product/bb-original-130-string-rz99621",
        "accessedDate": "2026-10-03",
        "quotedText": "The first of Luxilon's epic Big Banger line, Original features a poly-ether-ether blend. Specs: Gauge 16, mm 1.30. Page title: Original 130 Tennis String - Set."
      }
    },
    {
      "id": "luxilon-element",
      "brand": "Luxilon",
      "model": "Element",
      "material": "polyester",
      "construction": "Soft polyester using multi-mono technology",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Luxilon",
        "title": "Luxilon Element product page",
        "url": "https://www.luxilon.com/en-us/product/element-125-set-rz99110",
        "accessedDate": "2026-10-03",
        "quotedText": "Featuring multi-mono technology for additional touch and feel, Luxilon Element comprises a soft texture ... for players who dislike harsh vibrations caused by stiffer polyester strings. Specs: Gauge 17, mm 1.25; 130 page (rz99111): mm 1.3."
      }
    },
    {
      "id": "luxilon-element-rough",
      "brand": "Luxilon",
      "model": "Element Rough",
      "material": "polyester",
      "construction": "Multi-mono technology with a Luxilon polymer and a rougher, shaped surface",
      "shape": "Textured (rough)",
      "coating": null,
      "gaugesMm": [
        1.3
      ],
      "source": {
        "publisher": "Luxilon",
        "title": "Luxilon Element Rough product page",
        "url": "https://www.luxilon.com/en-us/product/element-rough-130-set-rz9971",
        "accessedDate": "2026-10-03",
        "quotedText": "Additional bite generated by a rougher texture. Multi-mono technology pairs with a unique Luxilon polymer ... the shaped string helps reduce vibrations. Specs: Gauge 16, mm 1.3."
      }
    },
    {
      "id": "luxilon-natural-gut",
      "brand": "Luxilon",
      "model": "Natural Gut",
      "material": "naturalGut",
      "construction": "Organic natural gut with a coating, designed for hybrids with Luxilon monofilaments",
      "shape": null,
      "coating": "Coating (type not specified)",
      "gaugesMm": [
        1.2,
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Luxilon",
        "title": "Luxilon Natural Gut product page",
        "url": "https://www.luxilon.com/en-us/product/natural-gut-125-set-rz94912",
        "accessedDate": "2026-10-03",
        "quotedText": "Luxilon Natural Gut sports a unique coating and organic raw material ... Engineered to work in combination with Luxilon monofilament strings. Specs: Gauge 17, mm 1.25; 130 page (rz94913): mm 1.30; 120 page (wr8302600): mm 1.2."
      }
    },
    {
      "id": "luxilon-original-rough",
      "brand": "Luxilon",
      "model": "Original Rough",
      "material": "polyester",
      "construction": "Poly-ether-ether blend with a dented, textured surface",
      "shape": "Textured (dented surface)",
      "coating": null,
      "gaugesMm": [
        1.3
      ],
      "source": {
        "publisher": "Luxilon",
        "title": "Luxilon Original Rough product page",
        "url": "https://www.luxilon.com/en-us/product/original-rough-130-set-rz99622",
        "accessedDate": "2026-10-03",
        "quotedText": "The poly-ether-ether blend in Original Rough utilizes a textured surface to create more string-on-ball friction ... The dented surface also provides more string flex. Specs: Gauge 16, mm 1.3."
      }
    },
    {
      "id": "polyfibre-black-venom",
      "brand": "Polyfibre",
      "model": "Black Venom",
      "material": "polyester",
      "construction": "Monofilament; Polyfibre lists the material as olefin-polymer (SMD technology)",
      "shape": "Textured",
      "coating": "Corona coating",
      "gaugesMm": [
        1.15,
        1.2,
        1.25,
        1.3
      ],
      "tensionGuidanceLbs": "No adjustment: string at your usual reference tension",
      "source": {
        "publisher": "Polyfibre",
        "title": "Polyfibre Black Venom product page",
        "url": "https://polyfibre.com/tennis-strings/strings-with-power",
        "accessedDate": "2026-10-03",
        "quotedText": "BLACK VENOM Gauge 1.15 / 1.20 / 1.25 / 1.30 mm ... Stringing normal Material Olefin-Polymer Surface textured Production Germany ... Through the application of olefins and a special corona coating the string has an \"orange skin\" type surface"
      }
    },
    {
      "id": "polyfibre-black-venom-rough",
      "brand": "Polyfibre",
      "model": "Black Venom Rough",
      "material": "polyester",
      "construction": "Monofilament; Polyfibre lists the material as olefin-polymer (SMD technology)",
      "shape": "Rough",
      "coating": "Corona coating",
      "gaugesMm": [
        1.25,
        1.3
      ],
      "tensionGuidanceLbs": "No adjustment: string at your usual reference tension",
      "source": {
        "publisher": "Polyfibre",
        "title": "Polyfibre Black Venom Rough product page",
        "url": "https://polyfibre.com/tennis-strings/strings-with-spin",
        "accessedDate": "2026-10-03",
        "quotedText": "BLACK VENOM ROUGH Gauge 1.25 / 1.30 mm ... Stringing normal Material Olefin-Polymer Surface rough Production Germany ... Through the application of olefins and a special corona coating"
      }
    },
    {
      "id": "polyfibre-cobra",
      "brand": "Polyfibre",
      "model": "Cobra",
      "material": "polyester",
      "construction": "Prestretched monofilament; Polyfibre lists the material as modified polyethylene",
      "shape": "Textured (rippled)",
      "coating": null,
      "gaugesMm": [
        1.2,
        1.25,
        1.3
      ],
      "tensionGuidanceLbs": "About 4.4 lbs (2 kg) above your usual reference tension",
      "source": {
        "publisher": "Polyfibre",
        "title": "Polyfibre Cobra product page",
        "url": "https://polyfibre.com/tennis-strings/strings-with-comfort",
        "accessedDate": "2026-10-03",
        "quotedText": "COBRA Gauge 1.20 / 1.25 / 1.30 mm ... Stringing 2 kg higher Material Polyethylene Surface structured Production Germany ... manufactured from a new type of modified polyethylene ... The string is prestretched ... It has a special rippled surface"
      }
    },
    {
      "id": "polyfibre-fire-rage",
      "brand": "Polyfibre",
      "model": "Fire Rage",
      "material": "polyester",
      "construction": "Monofilament; Polyfibre lists the material as polyethylene (SMD technology)",
      "shape": "Round (smooth)",
      "coating": "Corona coating",
      "gaugesMm": [
        1.1,
        1.15,
        1.2,
        1.25,
        1.3
      ],
      "tensionGuidanceLbs": "About 4.4 lbs (2 kg) below your usual reference tension",
      "source": {
        "publisher": "Polyfibre",
        "title": "Polyfibre Fire Rage product page",
        "url": "https://polyfibre.com/tennis-strings/strings-with-power",
        "accessedDate": "2026-10-03",
        "quotedText": "FIRE RAGE Gauge 1.10 / 1.15 / 1.20 / 1.25 / 1.30 mm ... Stringing 2 kg softer Material Polyethylene Surface smooth Production Germany ... The standardized molecular distribution (SMD) technology ... in combination with a corona coating"
      }
    },
    {
      "id": "polyfibre-hexablade",
      "brand": "Polyfibre",
      "model": "Hexablade",
      "material": "polyester",
      "construction": "Monofilament; Polyfibre lists the material as polyethylene (SMD technology)",
      "shape": "Hexagonal",
      "coating": null,
      "gaugesMm": [
        1.18,
        1.2,
        1.25
      ],
      "tensionGuidanceLbs": "No adjustment: string at your usual reference tension",
      "source": {
        "publisher": "Polyfibre",
        "title": "Polyfibre Hexablade product page",
        "url": "https://polyfibre.com/tennis-strings/strings-with-spin",
        "accessedDate": "2026-10-03",
        "quotedText": "HEXABLADE Gauge 1.18 / 1.20 / 1.25 mm ... Stringing normal Material Polyethylene Surface hexagonal Production Germany ... This ethylene string has a characteristic, hexagonal profile"
      }
    },
    {
      "id": "polyfibre-hightec-premium",
      "brand": "Polyfibre",
      "model": "Hightec Premium",
      "material": "polyester",
      "construction": "Thermo co-polymer monofilament",
      "shape": "Round (smooth)",
      "coating": "Thermo coating",
      "gaugesMm": [
        1.15,
        1.2,
        1.25,
        1.3
      ],
      "tensionGuidanceLbs": "About 2.2-4.4 lbs (1-2 kg) above your usual reference tension",
      "source": {
        "publisher": "Polyfibre",
        "title": "Polyfibre Hightec Premium product page",
        "url": "https://polyfibre.com/tennis-strings/strings-for-more-control",
        "accessedDate": "2026-10-03",
        "quotedText": "HIGHTEC PREMIUM Gauge 1.15 / 1.20 / 1.25 / 1.30 mm ... Stringing 1-2 kg higher Material Co-Polymer Surface smooth Production Germany ... This thermo co-polymer string ... A thermo coating provides the string with significantly increased durability"
      }
    },
    {
      "id": "polyfibre-panthera",
      "brand": "Polyfibre",
      "model": "Panthera",
      "material": "polyester",
      "construction": "Monofilament combining two polyester materials (duplex polyester)",
      "shape": "Round (dull surface)",
      "coating": null,
      "gaugesMm": [
        1.2,
        1.25,
        1.3
      ],
      "tensionGuidanceLbs": "About 4.4 lbs (2 kg) below your usual reference tension",
      "source": {
        "publisher": "Polyfibre",
        "title": "Polyfibre Panthera product page",
        "url": "https://polyfibre.com/tennis-strings/strings-for-more-control",
        "accessedDate": "2026-10-03",
        "quotedText": "PANTHERA Gauge 1.20 / 1.25 / 1.30 mm ... Stringing 2 kg softer Material Duplex-Polyester Surface dull Production Germany ... The combination of two different polyester materials"
      }
    },
    {
      "id": "polyfibre-tcs",
      "brand": "Polyfibre",
      "model": "TCS",
      "material": "polyester",
      "construction": "Monofilament; Polyfibre lists the material as polyethylene (SMD technology)",
      "shape": "Textured",
      "coating": null,
      "gaugesMm": [
        1.15,
        1.2,
        1.25,
        1.3
      ],
      "tensionGuidanceLbs": "No adjustment: string at your usual reference tension",
      "source": {
        "publisher": "Polyfibre",
        "title": "Polyfibre TCS product page",
        "url": "https://polyfibre.com/tennis-strings/strings-for-more-control",
        "accessedDate": "2026-10-03",
        "quotedText": "TCS Gauge 1.15 / 1.20 / 1.25 / 1.30 mm ... Stringing normal Material Polyethylene Surface textured Production Germany ... This polyethylene string has been modified using Polyfibre's own, specially developed SMD technology"
      }
    },
    {
      "id": "polyfibre-viper",
      "brand": "Polyfibre",
      "model": "Viper",
      "material": "polyester",
      "construction": "Monofilament; Polyfibre lists the material as olefin-polymer (SMD technology)",
      "shape": "Round (smooth)",
      "coating": "Corona coating",
      "gaugesMm": [
        1.15,
        1.2,
        1.25,
        1.3
      ],
      "tensionGuidanceLbs": "About 2.2 lbs (1 kg) below your usual reference tension",
      "source": {
        "publisher": "Polyfibre",
        "title": "Polyfibre Viper product page",
        "url": "https://polyfibre.com/tennis-strings/strings-with-power",
        "accessedDate": "2026-10-03",
        "quotedText": "VIPER Gauge 1.15 / 1.20 / 1.25 / 1.30 mm ... Stringing 1 kg softer Material Olefin-Polymer Surface smooth Production Germany ... SMD (Standardized Molecular Distribution) technology and the Corona coating"
      }
    },
    {
      "id": "prince-beast-xt",
      "brand": "Prince",
      "model": "Beast XT",
      "material": "polyester",
      "construction": "Hollow (donut-shaped) high-heat-resistance polyester with elastomer inside",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Prince Japan",
        "title": "Prince Beast XT product page",
        "url": "https://princetennis.jp/product/7jj052",
        "accessedDate": "2026-10-03",
        "quotedText": "ドーナツ状のポリエステルの中に衝撃吸収性の高いエラストマー素材を採用; 16 / 1.30mm; 素材 ポリエステル; 構造 高耐熱ポリエステル＋エラストマー. 17 page (7jj053): 17 / 1.25mm."
      }
    },
    {
      "id": "prince-emblem-soft",
      "brand": "Prince",
      "model": "Emblem Soft",
      "material": "multifilament",
      "construction": "Nylon high-elasticity multifilament with special silicone coating",
      "shape": null,
      "coating": "Silicone coating",
      "gaugesMm": [
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Prince Japan",
        "title": "Prince Emblem Soft product page",
        "url": "https://princetennis.jp/product/7jj046",
        "accessedDate": "2026-10-03",
        "quotedText": "16 / 1.30mm; 素材 ナイロン; 構造 高弾性マルチフィラメント＋シリコン特殊コーティング. 17 page (7jj047): 17 / 1.25mm."
      }
    },
    {
      "id": "prince-lightning-xp",
      "brand": "Prince",
      "model": "Lightning XP",
      "material": "syntheticGut",
      "construction": "Nylon monofilament with Triple Core Technology outer filaments",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.24,
        1.3
      ],
      "source": {
        "publisher": "Prince Japan",
        "title": "Prince Lightning XP product page",
        "url": "https://princetennis.jp/product/7jj001",
        "accessedDate": "2026-10-03",
        "quotedText": "トリプルコアテクノロジーを搭載した側糸を周囲に配し ... モノフィラメントストリングス; 16 / 1.30mm; 素材 ナイロン; 構造 特殊モノフィラメント＋トリプルコアテクノロジー. 17 page (7jj002): 17 / 1.24mm."
      }
    },
    {
      "id": "prince-natural-gut",
      "brand": "Prince",
      "model": "Natural Gut",
      "material": "naturalGut",
      "construction": "Natural gut",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.3
      ],
      "source": {
        "publisher": "Prince Japan",
        "title": "Prince Natural Gut product page",
        "url": "https://princetennis.jp/product/7j800",
        "accessedDate": "2026-10-03",
        "quotedText": "天然素材ならではのしなやかさとパワーを実現するナチュラルストリング; ゲージ（太さ） 16 / 1.30mm; 素材 天然ガット."
      }
    },
    {
      "id": "prince-phantom-pro",
      "brand": "Prince",
      "model": "Phantom Pro",
      "material": "polyester",
      "construction": "Polyester monofilament: high-heat-resistance polymer with silicone coating",
      "shape": null,
      "coating": "Silicone coating",
      "gaugesMm": [
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Prince Japan",
        "title": "Prince Phantom Pro product page",
        "url": "https://princetennis.jp/product/7jj035",
        "accessedDate": "2026-10-03",
        "quotedText": "16 page: ゲージ（太さ） 16 / 1.30mm; 素材 ポリエステル; 構造 高耐熱高分子ポリマー＋シリコンコーティング. 17 page (7jj036): 17 / 1.25mm."
      }
    },
    {
      "id": "prince-phantom-spin",
      "brand": "Prince",
      "model": "Phantom Spin",
      "material": "polyester",
      "construction": "Polyester monofilament: high-heat-resistance polymer with silicone coating",
      "shape": "Hexagonal with rounded corners",
      "coating": "Silicone coating",
      "gaugesMm": [
        1.24,
        1.29
      ],
      "source": {
        "publisher": "Prince Japan",
        "title": "Prince Phantom Spin product page",
        "url": "https://princetennis.jp/product/7jj048",
        "accessedDate": "2026-10-03",
        "quotedText": "Prince独自の角を無くした6角形; 16 / 1.29mm; 素材 ポリエステル; 構造 高耐熱高分子ポリマー＋シリコンコーティング. 17 page (7jj049): 17 / 1.24mm."
      }
    },
    {
      "id": "prince-phantom-touch",
      "brand": "Prince",
      "model": "Phantom Touch",
      "material": "polyester",
      "construction": "Polyester monofilament: high-heat-resistance polymer with silicone coating",
      "shape": null,
      "coating": "Silicone coating",
      "gaugesMm": [
        1.19,
        1.24,
        1.29
      ],
      "source": {
        "publisher": "Prince Japan",
        "title": "Prince Phantom Touch product page",
        "url": "https://princetennis.jp/product/7jj039",
        "accessedDate": "2026-10-03",
        "quotedText": "16 page: 16 / 1.29mm; 素材 ポリエステル; 構造 高耐熱高分子ポリマー＋シリコンコーティング. 17 page (7jj040): 17 / 1.24mm; 18 page (7jj041): 18 / 1.19mm."
      }
    },
    {
      "id": "prince-synthetic-gut-df",
      "brand": "Prince",
      "model": "Synthetic Gut DF",
      "material": "syntheticGut",
      "construction": "Nylon monofilament core with Duraflex outer wrap",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.15,
        1.22,
        1.3
      ],
      "source": {
        "publisher": "Prince Japan",
        "title": "Prince Synthetic Gut DF product page",
        "url": "https://princetennis.jp/product/7j720",
        "accessedDate": "2026-10-03",
        "quotedText": "芯糸の周りにデュラフレックス素材を巻きつけ; 16 / 1.30mm; 素材 ナイロン; 構造 モノフィラメント＋デュラフレックス. 17 page (7j72201): 17 / 1.22mm; 18 page (7j72501): 18 / 1.15mm."
      }
    },
    {
      "id": "prince-tour-xt",
      "brand": "Prince",
      "model": "Tour XT",
      "material": "polyester",
      "construction": "Elastic thermo-poly polyester monofilament, thin gauge",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.18
      ],
      "source": {
        "publisher": "Prince Japan",
        "title": "Prince Tour XT product page",
        "url": "https://princetennis.jp/product/7j912",
        "accessedDate": "2026-10-03",
        "quotedText": "エラスティックサーモポリで作られた超極細ゲージのポリエステル; 18 / 1.18mm; 素材 ポリエステル; 構造 エラスティックサーモポリ. Only an 18-gauge version is listed."
      }
    },
    {
      "id": "prince-tour-xx-spin",
      "brand": "Prince",
      "model": "Tour XX Spin",
      "material": "polyester",
      "construction": "High-heat-resistance polyester monofilament (Five Valve process)",
      "shape": "Five large grooves",
      "coating": null,
      "gaugesMm": [
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Prince Japan",
        "title": "Prince Tour XX Spin product page",
        "url": "https://princetennis.jp/product/7jj023",
        "accessedDate": "2026-10-03",
        "quotedText": "ファイブバルブ製法によって出来る大きな5つの溝; 16 / 1.30mm; 素材 ポリエステル; 構造 高耐熱ポリエステル＋ファイブバルブ製法. 17 page (7jj024): 17 / 1.25mm."
      }
    },
    {
      "id": "solinco-barb-wire",
      "brand": "Solinco",
      "model": "Barb Wire",
      "material": "polyester",
      "construction": "Co-polyester monofilament",
      "shape": "Shaped (spin-coiled)",
      "coating": null,
      "gaugesMm": [
        1.2,
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Solinco",
        "title": "Solinco Barb Wire product page",
        "url": "https://solincosports.com/equipment/barb-wire/",
        "accessedDate": "2026-10-03",
        "quotedText": "Engineered and developed, ultra-performance co-polyester string designed and shaped ... String Gauge: 16 (1.30) 16L (1.25) 17 (1.20) ... Spin-coiled design: Allows for its sharp edges to cut into the ball's felt."
      }
    },
    {
      "id": "solinco-confidential",
      "brand": "Solinco",
      "model": "Confidential",
      "material": "polyester",
      "construction": "Co-polyester monofilament",
      "shape": "Shaped",
      "coating": null,
      "gaugesMm": [
        1.15,
        1.2,
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Solinco",
        "title": "Solinco Confidential product page",
        "url": "https://solincosports.com/equipment/confidential/",
        "accessedDate": "2026-10-03",
        "quotedText": "A newly developed, high-performance and versatile co-polyester string ... the high-powered polyester monofilament fiber designed and shaped. String Gauge: 16 (1.30) 16L (1.25) 17 (1.20) 18 (1.15)."
      }
    },
    {
      "id": "solinco-hyper-g",
      "brand": "Solinco",
      "model": "Hyper-G",
      "material": "polyester",
      "construction": "Co-polyester monofilament",
      "shape": "Shaped",
      "coating": null,
      "gaugesMm": [
        1.05,
        1.1,
        1.15,
        1.2,
        1.25,
        1.3,
        1.35
      ],
      "source": {
        "publisher": "Solinco",
        "title": "Solinco Hyper-G product page",
        "url": "https://solincosports.com/equipment/hyper-g/",
        "accessedDate": "2026-10-03",
        "quotedText": "A newly developed, high-performance and versatile co-polyester string ... the high-powered polyester filament fiber designed and shaped. String Gauge: 15L (1.35) 16 (1.30) 16L (1.25) 17 (1.20) 18 (1.15) 19 (1.10) 20 (1.05). Distinct Shape: Proprietary shaped polyester design."
      }
    },
    {
      "id": "solinco-hyper-g-round",
      "brand": "Solinco",
      "model": "Hyper-G Round",
      "material": "polyester",
      "construction": "Co-polyester monofilament",
      "shape": "Round",
      "coating": null,
      "gaugesMm": [
        1.15,
        1.2,
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Solinco",
        "title": "Solinco Hyper-G Round product page",
        "url": "https://solincosports.com/equipment/hyper-g-round/",
        "accessedDate": "2026-10-03",
        "quotedText": "Hyper-G Round features a smooth surface ... Engineered with a round profile. String Gauge: 16 (1.30) 16L (1.25) 17 (1.20) 18 (1.15). Listed under Strings / Co-Polyester."
      }
    },
    {
      "id": "solinco-hyper-g-soft",
      "brand": "Solinco",
      "model": "Hyper-G Soft",
      "material": "polyester",
      "construction": "Softer co-polyester monofilament",
      "shape": "Shaped",
      "coating": null,
      "gaugesMm": [
        1.15,
        1.2,
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Solinco",
        "title": "Solinco Hyper-G Soft product page",
        "url": "https://solincosports.com/equipment/hyper-g-soft/",
        "accessedDate": "2026-10-03",
        "quotedText": "A newly developed, softer high-performance and versatile co-polyester string ... the high-powered polyester monofilament fiber designed and shaped. String Gauge: 16 (1.30) 16L (1.25) 17 (1.20) 18 (1.15)."
      }
    },
    {
      "id": "solinco-mach-10",
      "brand": "Solinco",
      "model": "Mach-10",
      "material": "polyester",
      "construction": "Co-polyester monofilament",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.15,
        1.2,
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Solinco",
        "title": "Solinco Mach-10 product page",
        "url": "https://solincosports.com/equipment/mach10/",
        "accessedDate": "2026-10-03",
        "quotedText": "Mach-10 is Solinco's newest co-polyester string. String Gauge: 16 (1.30) 16L (1.25) 17 (1.20) 18 (1.15)."
      }
    },
    {
      "id": "solinco-outlast",
      "brand": "Solinco",
      "model": "Outlast",
      "material": "polyester",
      "construction": "Co-polyester monofilament",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.15,
        1.2,
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Solinco",
        "title": "Solinco Outlast product page",
        "url": "https://solincosports.com/equipment/outlast/",
        "accessedDate": "2026-10-03",
        "quotedText": "A newly developed, high-performance and well-rounded co-polyester string ... Utilizes an innovative high-powered co-polyester monofilament fiber. String Gauge: 16 (1.30) 16L (1.25) 17 (1.20) 18 (1.15)."
      }
    },
    {
      "id": "solinco-pro-stacked",
      "brand": "Solinco",
      "model": "Pro Stacked",
      "material": "syntheticGut",
      "construction": "Central core wrapped in multifibers",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.2,
        1.3,
        1.35
      ],
      "source": {
        "publisher": "Solinco",
        "title": "Solinco Pro Stacked product page",
        "url": "https://solincosports.com/equipment/pro-stacked/",
        "accessedDate": "2026-10-03",
        "quotedText": "An enhanced, high performance synthetic gut string ... Features a newly developed central power-core encapsulated by high performance, responsive multifibers. String Gauge: 15L (1.35) 16 (1.30) 17 (1.20)."
      }
    },
    {
      "id": "solinco-revolution",
      "brand": "Solinco",
      "model": "Revolution",
      "material": "polyester",
      "construction": "Co-polyester monofilament",
      "shape": "Six-sided",
      "coating": null,
      "gaugesMm": [
        1.15,
        1.2,
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Solinco",
        "title": "Solinco Revolution product page",
        "url": "https://solincosports.com/equipment/revolution/",
        "accessedDate": "2026-10-03",
        "quotedText": "Utilizes an innovative high-powered co-polyester monofilament fiber designed and shaped ... Six-sided design maximizes grip on the ball. String Gauge: 16 (1.30) 16L (1.25) 17 (1.20) 18 (1.15)."
      }
    },
    {
      "id": "solinco-tour-bite",
      "brand": "Solinco",
      "model": "Tour Bite",
      "material": "polyester",
      "construction": "Co-polyester monofilament",
      "shape": "Shaped",
      "coating": null,
      "gaugesMm": [
        1.05,
        1.1,
        1.15,
        1.2,
        1.25,
        1.3,
        1.35
      ],
      "source": {
        "publisher": "Solinco",
        "title": "Solinco Tour Bite product page",
        "url": "https://solincosports.com/equipment/tour-bite/",
        "accessedDate": "2026-10-03",
        "quotedText": "Utilizes an innovative, high-powered co-polyester monofilament fiber designed and shaped. String Gauge: 15L (1.35) 16 (1.30) 16L (1.25) 17 (1.20) 18 (1.15) 19 (1.10) 20 (1.05)."
      }
    },
    {
      "id": "solinco-tour-bite-soft",
      "brand": "Solinco",
      "model": "Tour Bite Soft",
      "material": "polyester",
      "construction": "Softer polyester monofilament",
      "shape": "Shaped",
      "coating": null,
      "gaugesMm": [
        1.15,
        1.2,
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Solinco",
        "title": "Solinco Tour Bite Soft product page",
        "url": "https://solincosports.com/equipment/tour-bite-soft/",
        "accessedDate": "2026-10-03",
        "quotedText": "A newly developed, softer high-performance and versatile polyester string ... with the high-powered polyester monofilament fiber designed and shaped. String Gauge: 16 (1.30) 16L (1.25) 17 (1.20) 18 (1.15)."
      }
    },
    {
      "id": "solinco-vanquish",
      "brand": "Solinco",
      "model": "Vanquish",
      "material": "multifilament",
      "construction": "High-modulus polyamide multifilament core with performance resin",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.2,
        1.3,
        1.35
      ],
      "source": {
        "publisher": "Solinco",
        "title": "Solinco Vanquish product page",
        "url": "https://solincosports.com/equipment/vanquish/",
        "accessedDate": "2026-10-03",
        "quotedText": "An arm-friendly multifilament string ... Unique construction features a Du Pont High Modulus polyamide multifilament core and enhanced performance resin. String Gauge: 15L (1.35) 16 (1.30) 17 (1.20)."
      }
    },
    {
      "id": "solinco-x-natural",
      "brand": "Solinco",
      "model": "X-Natural",
      "material": "multifilament",
      "construction": "High-modulus fibers bonded with TPU resin, Diamond Rough texture",
      "shape": "Textured",
      "coating": "TPU-silicone outer coating",
      "gaugesMm": [
        1.2,
        1.3,
        1.35
      ],
      "source": {
        "publisher": "Solinco",
        "title": "Solinco X-Natural product page",
        "url": "https://solincosports.com/equipment/x-natural/",
        "accessedDate": "2026-10-03",
        "quotedText": "Arm-friendly multifilament string utilizing a thermoplastic polyurethane (TPU) resin for bonding, TPU-Silicone compound outer coating, as well as the Diamond Rough texturing process. String Gauge: 15L (1.35) 16 (1.30) 17 (1.20)."
      }
    },
    {
      "id": "tecnifibre-4s",
      "brand": "Tecnifibre",
      "model": "4S",
      "material": "polyester",
      "construction": "Co-polyester monofilament (Thermocore)",
      "shape": "Square",
      "coating": null,
      "gaugesMm": [
        1.2,
        1.25,
        1.3
      ],
      "tensionGuidanceLbs": "48.5-55 lbs (22-25 kg) recommended; maximum 70.5 lbs (32 kg)",
      "source": {
        "publisher": "Tecnifibre",
        "title": "Tecnifibre 4S product page",
        "url": "https://www.tecnifibre.com/en/products/garniture-4s-noir",
        "accessedDate": "2026-10-03",
        "quotedText": "Composed of 100% Co-polyester with a square structure. We recommend a tension between 22 and 25 kg. Maximum tension: 32 kg. Gauge: 1.20 / 1.25 / 1.30"
      }
    },
    {
      "id": "tecnifibre-black-code",
      "brand": "Tecnifibre",
      "model": "Black Code",
      "material": "polyester",
      "construction": "Co-polyester monofilament (Thermocore)",
      "shape": "Pentagonal",
      "coating": null,
      "gaugesMm": [
        1.18,
        1.24,
        1.28,
        1.32
      ],
      "tensionGuidanceLbs": "48.5-55 lbs (22-25 kg) recommended; maximum 70.5 lbs (32 kg)",
      "source": {
        "publisher": "Tecnifibre",
        "title": "Tecnifibre Black Code product page",
        "url": "https://www.tecnifibre.com/en/products/garniture-black-code",
        "accessedDate": "2026-10-03",
        "quotedText": "Composed of 100% Co-polyester with a pentagonal structure. We recommend a tension between 22 and 25 kg. Maximum tension: 32 kg. Gauge: 1.18 / 1.24 / 1.28 / 1.32"
      }
    },
    {
      "id": "tecnifibre-duramix",
      "brand": "Tecnifibre",
      "model": "Duramix",
      "material": "multifilament",
      "construction": "50% polyamide / 50% polyester filaments with HD polyurethane",
      "shape": null,
      "coating": "Slip agent (SPL) finish",
      "gaugesMm": [
        1.25,
        1.3,
        1.35
      ],
      "tensionGuidanceLbs": "48.5-55 lbs (22-25 kg) recommended; maximum 70.5 lbs (32 kg)",
      "source": {
        "publisher": "Tecnifibre",
        "title": "Tecnifibre Duramix product page",
        "url": "https://www.tecnifibre.com/en/products/garniture-duramix-naturel",
        "accessedDate": "2026-10-03",
        "quotedText": "Composed of a blend of polyamide and polyester filaments: 50% Polyamide fibers ... 50% Polyester fibers ... Recommended tension: 22-25 kg Maximum tension: 32 kg ... Finishing the string with a slip agent (SPL). Strings type: Multifilament. Gauge: 1.25 / 1.30 / 1.35"
      }
    },
    {
      "id": "tecnifibre-ice-code",
      "brand": "Tecnifibre",
      "model": "Ice Code",
      "material": "polyester",
      "construction": "Co-polyester monofilament",
      "shape": "Round",
      "coating": "Wax finish",
      "gaugesMm": [
        1.2,
        1.25,
        1.3
      ],
      "tensionGuidanceLbs": "48.5-55 lbs (22-25 kg) recommended; maximum 70.5 lbs (32 kg)",
      "source": {
        "publisher": "Tecnifibre",
        "title": "Tecnifibre Ice Code product page",
        "url": "https://www.tecnifibre.com/en/products/garniture-ice-code-blanc",
        "accessedDate": "2026-10-03",
        "quotedText": "Made of 100% Co-polyester with a round structure and a Wax finish. Recommended tension: 22-25 kg Maximum tension: 32 kg. Gauge: 1.20 / 1.25 / 1.30"
      }
    },
    {
      "id": "tecnifibre-nrg2",
      "brand": "Tecnifibre",
      "model": "NRG2",
      "material": "multifilament",
      "construction": "1200+ Elastyl microfilaments, PU 400 impregnated",
      "shape": null,
      "coating": "Anti-abrasion SPL coating",
      "gaugesMm": [
        1.18,
        1.24,
        1.32
      ],
      "source": {
        "publisher": "Tecnifibre",
        "title": "Tecnifibre NRG2 product page",
        "url": "https://www.tecnifibre.com/en/products/garniture-nrg2-naturel",
        "accessedDate": "2026-10-03",
        "quotedText": "Specific construction: Over 1200 microfilaments composed of Elastyl ... Impregnated throughout with polyurethane 400 ... SPL final coating: Anti-abrasion coating for increased resistance. Strings type: Multifilament. Gauge: 1.18 / 1.24 / 1.32"
      }
    },
    {
      "id": "tecnifibre-razor-code",
      "brand": "Tecnifibre",
      "model": "Razor Code",
      "material": "polyester",
      "construction": "Co-polyester monofilament (Thermocore)",
      "shape": "Round",
      "coating": null,
      "gaugesMm": [
        1.2,
        1.25,
        1.3
      ],
      "tensionGuidanceLbs": "48.5-55 lbs (22-25 kg) recommended; maximum 70.5 lbs (32 kg)",
      "source": {
        "publisher": "Tecnifibre",
        "title": "Tecnifibre Razor Code product page",
        "url": "https://www.tecnifibre.com/en/products/garniture-razor-code-carbon",
        "accessedDate": "2026-10-03",
        "quotedText": "Main material: Co-polyester. Recommended tension: Between 22 and 25 kg. Maximum tension: 32 kg ... Thermocore technology ... Round section. Strings type: Monofilament. Gauge: 1.20 / 1.25 / 1.30"
      }
    },
    {
      "id": "tecnifibre-razor-soft",
      "brand": "Tecnifibre",
      "model": "Razor Soft",
      "material": "polyester",
      "construction": "Co-polyester monofilament with PU additives",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.2,
        1.25,
        1.3
      ],
      "tensionGuidanceLbs": "48.5-55 lbs (22-25 kg) recommended; maximum 70.5 lbs (32 kg)",
      "source": {
        "publisher": "Tecnifibre",
        "title": "Tecnifibre Razor Soft product page",
        "url": "https://www.tecnifibre.com/en/products/garniture-razor-soft-carbon",
        "accessedDate": "2026-10-03",
        "quotedText": "Main material: Co-polyester and PU additives - recommended tension between 22 and 25 kg - maximum tension: 32 kg. Strings type: Monofilament. Gauge: 1.20 / 1.25 / 1.30"
      }
    },
    {
      "id": "tecnifibre-razor-spin",
      "brand": "Tecnifibre",
      "model": "Razor Spin",
      "material": "polyester",
      "construction": "Co-polyester monofilament with PU additives",
      "shape": "Square",
      "coating": null,
      "gaugesMm": [
        1.15,
        1.2,
        1.25,
        1.3
      ],
      "tensionGuidanceLbs": "48.5-55 lbs (22-25 kg) recommended; maximum 70.5 lbs (32 kg)",
      "source": {
        "publisher": "Tecnifibre",
        "title": "Tecnifibre Razor Spin product page",
        "url": "https://www.tecnifibre.com/en/products/garniture-razor-spin",
        "accessedDate": "2026-10-03",
        "quotedText": "The RAZOR SPIN string ... features a square cross-section ... Main material: Co-polyester and PU additives - recommended tension between 22 and 25 kg - maximum tension: 32 kg. Gauge: 1.15 / 1.20 / 1.25 / 1.30"
      }
    },
    {
      "id": "tecnifibre-red-code",
      "brand": "Tecnifibre",
      "model": "Red Code",
      "material": "polyester",
      "construction": "Co-polyester monofilament (Thermocore)",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.2,
        1.25,
        1.3
      ],
      "tensionGuidanceLbs": "48.5-55 lbs (22-25 kg) recommended; maximum 70.5 lbs (32 kg)",
      "source": {
        "publisher": "Tecnifibre",
        "title": "Tecnifibre Red Code product page",
        "url": "https://www.tecnifibre.com/en/products/garniture-red-code",
        "accessedDate": "2026-10-03",
        "quotedText": "Main material: Co-polyester - recommended tension between 22 and 25 kg - maximum tension: 32 kg ... monofilament copolyester with Thermocore process. Gauge: 1.20 / 1.25 / 1.30"
      }
    },
    {
      "id": "tecnifibre-tgv",
      "brand": "Tecnifibre",
      "model": "TGV",
      "material": "multifilament",
      "construction": "1200+ polyamide microfilaments with PU 400",
      "shape": null,
      "coating": "SPL surface treatment",
      "gaugesMm": [
        1.25,
        1.3,
        1.35,
        1.4
      ],
      "source": {
        "publisher": "Tecnifibre",
        "title": "Tecnifibre TGV product page",
        "url": "https://www.tecnifibre.com/en/products/garniture-tgv-naturel",
        "accessedDate": "2026-10-03",
        "quotedText": "A specific construction of more than 1200 polyamide microfilaments. The TGV benefits from the highest percentage of Polyurethane 400 ... An exclusive surface treatment: SPL. Strings type: Multifilament. Gauge: 1.25 / 1.30 / 1.35 / 1.40"
      }
    },
    {
      "id": "tecnifibre-x-one-biphase",
      "brand": "Tecnifibre",
      "model": "X-One Biphase",
      "material": "multifilament",
      "construction": "1400+ filaments (50% Elastyl, 50% H2C), PU 400 impregnated, pre-stretched",
      "shape": null,
      "coating": "Slip agent (SPL) finish",
      "gaugesMm": [
        1.18,
        1.24,
        1.3,
        1.34
      ],
      "tensionGuidanceLbs": "48.5-55 lbs (22-25 kg) recommended; maximum 70.5 lbs (32 kg)",
      "source": {
        "publisher": "Tecnifibre",
        "title": "Tecnifibre X-One Biphase product page",
        "url": "https://www.tecnifibre.com/en/products/garniture-x-one-biphase-naturel",
        "accessedDate": "2026-10-03",
        "quotedText": "Composed of over 1400 filaments ... 50% Elastyl fibers ... 50% H2C fibers ... The stringing is finished with a slippery agent (SPL) ... We recommend a tension between 22 and 25 kg (maximum tension: 32 kg). Gauge: 1.18 / 1.24 / 1.30 / 1.34"
      }
    },
    {
      "id": "tecnifibre-xr3",
      "brand": "Tecnifibre",
      "model": "XR3",
      "material": "multifilament",
      "construction": "Polyamide microfilaments with 3 PHP monofilaments and polyurethane",
      "shape": null,
      "coating": "Silicone finish",
      "gaugesMm": [
        1.25,
        1.3
      ],
      "tensionGuidanceLbs": "48.5-55 lbs (22-25 kg) recommended; maximum 70.5 lbs (32 kg)",
      "source": {
        "publisher": "Tecnifibre",
        "title": "Tecnifibre XR3 product page",
        "url": "https://www.tecnifibre.com/en/products/garniture-xr3-naturel",
        "accessedDate": "2026-10-03",
        "quotedText": "Main material: Polyamide, polyurethane, silicone finish - recommended tension between 22 and 25 kg - maximum tension: 32 kg ... a dry touch obtained by the 3 PHP monofilaments (high performance polymer). Gauge: 1.25 / 1.30"
      }
    },
    {
      "id": "volkl-cyclone",
      "brand": "Volkl",
      "model": "Cyclone",
      "material": "polyester",
      "construction": "Co-polymer monofilament",
      "shape": "Ten-sided",
      "coating": null,
      "gaugesMm": [],
      "gaugeNote": "Völkl lists 15L, 16, 17, 18, 18L and 19 gauges without millimetre diameters.",
      "source": {
        "publisher": "Volkl",
        "title": "Völkl Cyclone product page",
        "url": "https://www.volkltennis.com/products/cyclone-sets-17g",
        "accessedDate": "2026-10-03",
        "quotedText": "Cyclone is a unique ten-sided co-polymer string. The string shape enhances spin and control while offering good durability."
      }
    },
    {
      "id": "volkl-cyclone-tour",
      "brand": "Volkl",
      "model": "Cyclone Tour",
      "material": "polyester",
      "construction": "Softer co-polymer monofilament, twisted",
      "shape": "Ten-sided, twisted",
      "coating": null,
      "gaugesMm": [],
      "gaugeNote": "Völkl lists 16, 17 and 18 gauges without millimetre diameters.",
      "source": {
        "publisher": "Volkl",
        "title": "Völkl Cyclone Tour product page",
        "url": "https://www.volkltennis.com/products/cyclone-tour-sets-17g",
        "accessedDate": "2026-10-03",
        "quotedText": "Cyclone Tour is a softer co-polymer ten-sided string which is twisted to give more spin and great control."
      }
    },
    {
      "id": "volkl-v-square",
      "brand": "Volkl",
      "model": "V-Square",
      "material": "polyester",
      "construction": "Co-polymer monofilament",
      "shape": "Square",
      "coating": null,
      "gaugesMm": [],
      "gaugeNote": "Völkl lists 16, 17, 18 and 19 gauges without millimetre diameters.",
      "source": {
        "publisher": "Volkl",
        "title": "Völkl V-Square product page",
        "url": "https://www.volkltennis.com/products/v-square-sets-17g",
        "accessedDate": "2026-10-03",
        "quotedText": "V-Square leads this new generation of co-polymer with a true square shape for sharp corners that provide superior bite on the ball."
      }
    },
    {
      "id": "volkl-v-star",
      "brand": "Volkl",
      "model": "V-Star",
      "material": "polyester",
      "construction": "Smooth-finish co-polymer monofilament",
      "shape": null,
      "coating": null,
      "gaugesMm": [],
      "gaugeNote": "Völkl lists 16, 17, 18, 18L and 19 gauges without millimetre diameters.",
      "source": {
        "publisher": "Volkl",
        "title": "Völkl V-Star product page",
        "url": "https://www.volkltennis.com/products/v-star-sets-17g",
        "accessedDate": "2026-10-03",
        "quotedText": "V-Star is a smooth finish co-polymer string using advanced material technology."
      }
    },
    {
      "id": "wilson-champions-choice-duo",
      "brand": "Wilson",
      "model": "Champion's Choice Duo",
      "material": "hybrid",
      "construction": "Hybrid set: Wilson Natural Gut 16 (1.30 mm) with Luxilon ALU Power Rough 17 (1.25 mm)",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Wilson",
        "title": "Wilson Champion's Choice Duo product page",
        "url": "https://www.wilson.com/en-us/product/champion-s-choice-duo-set-rz99790",
        "accessedDate": "2026-10-03",
        "quotedText": "Champion's Choice Duo combines the power and feel of Wilson's Natural Gut (16/1.30) with the durability and spin of Luxilon's ALU Power Rough (17/1.25)."
      }
    },
    {
      "id": "wilson-natural-gut",
      "brand": "Wilson",
      "model": "Natural Gut",
      "material": "naturalGut",
      "construction": "Natural serosa fibers treated in stabilizing chemicals, with a protective outer coating",
      "shape": null,
      "coating": "Protective outer coating",
      "gaugesMm": [
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Wilson",
        "title": "Wilson Natural Gut product page",
        "url": "https://www.wilson.com/en-us/product/natural-gut-17-set-wr8305000",
        "accessedDate": "2026-10-03",
        "quotedText": "Comprised of natural serosa fibers treated in bath of stabilizing chemicals with outer coating applied for protection. Specs: Gauge 17, mm 1.25; 16 page (rz99980): mm 1.3."
      }
    },
    {
      "id": "wilson-nxt",
      "brand": "Wilson",
      "model": "NXT",
      "material": "multifilament",
      "construction": "Xycro microfibers impregnated with polyurethane around an X-bonded core",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.24,
        1.3
      ],
      "source": {
        "publisher": "Wilson",
        "title": "Wilson NXT product page",
        "url": "https://www.wilson.com/en-us/product/nxt-16-set-wr8312000",
        "accessedDate": "2026-10-03",
        "quotedText": "Featuring proprietary xycro microfibers impregnated with PU for enhanced comfort and power ... It's X-bonded core increases tension maintenance. Specs: Gauge 16, mm 1.3. 17-gauge set page (wr8312300): Gauge 17, mm 1.24."
      }
    },
    {
      "id": "wilson-nxt-control",
      "brand": "Wilson",
      "model": "NXT Control",
      "material": "multifilament",
      "construction": "Polyester and nylon microfibers wrapped in a polyurethane bed",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.32
      ],
      "source": {
        "publisher": "Wilson",
        "title": "Wilson NXT Control product page",
        "url": "https://www.wilson.com/en-us/product/nxt-control-16-set-rz94190",
        "accessedDate": "2026-10-03",
        "quotedText": "NXT Control features polyester and nylon microfibers fibers wrapped in a bed of polyurethane that provides hybrid benefits. Specs: Gauge 16, mm 1.32."
      }
    },
    {
      "id": "wilson-nxt-duramax",
      "brand": "Wilson",
      "model": "NXT Duramax",
      "material": "multifilament",
      "construction": "PU-bonded fiber core protected by Abrasion Shields",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.32
      ],
      "gaugeNote": "A 15 gauge is also offered; its diameter was not published on the cited page.",
      "source": {
        "publisher": "Wilson",
        "title": "Wilson NXT Duramax product page",
        "url": "https://www.wilson.com/en-us/product/nxt-duramax-16-wr8303700",
        "accessedDate": "2026-10-03",
        "quotedText": "NXT Duramax features Abrasion Shields to protect PU-bonded fibers in core and layer extra resistance to string breakage. Specs: Gauge 16, mm 1.32."
      }
    },
    {
      "id": "wilson-nxt-power",
      "brand": "Wilson",
      "model": "NXT Power",
      "material": "multifilament",
      "construction": "High-crystallinity Xycro microfibers bonded with polyurethane around a ribbon-like co-polymer core",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.21,
        1.26,
        1.3
      ],
      "source": {
        "publisher": "Wilson",
        "title": "Wilson NXT Power product page",
        "url": "https://www.wilson.com/en-us/product/nxt-power-16-set-wr8304800",
        "accessedDate": "2026-10-03",
        "quotedText": "NXT Power features high crystallinity xycro microfibers bonded with polyurethane ... The core is composed of a ribbon-like co-polymer. Specs: Gauge 16, mm 1.3; 17-gauge page (wr8304900): mm 1.26; 18-gauge page (rz94160): mm 1.21."
      }
    },
    {
      "id": "wilson-revolve",
      "brand": "Wilson",
      "model": "Revolve",
      "material": "polyester",
      "construction": "Tri-polymer monofilament with a low-friction additive",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Wilson",
        "title": "Wilson Revolve product page",
        "url": "https://www.wilson.com/en-us/product/revolve-16-set-rz94620",
        "accessedDate": "2026-10-03",
        "quotedText": "Featuring a tri-polymer construction with a low-friction additive. Specs: Gauge 16, mm 1.3; 17 page (rz94630): mm 1.25. Wilson's Spin Effect Hybrid page (rz95920) describes \"spin-enhancing Revolve (17/1.25) polyester\"."
      }
    },
    {
      "id": "wilson-revolve-spin",
      "brand": "Wilson",
      "model": "Revolve Spin",
      "material": "polyester",
      "construction": "Crosslink ester polymer monofilament with low-friction UHMW material",
      "shape": "Pentagonal",
      "coating": null,
      "gaugesMm": [
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Wilson",
        "title": "Wilson Revolve Spin product page",
        "url": "https://www.wilson.com/en-us/product/revolve-spin-16-set-rz95680",
        "accessedDate": "2026-10-03",
        "quotedText": "Featuring a unique pentagonal shape and low-friction UHMW material ... This string's crosslink ester polymer composition amplifies feel and tension maintenance. Specs: Gauge 16, mm 1.3; 17 page (wr8303800): mm 1.25."
      }
    },
    {
      "id": "wilson-sensation",
      "brand": "Wilson",
      "model": "Sensation",
      "material": "multifilament",
      "construction": "Elastic nylon fibers with two outer wraps applied in opposite directions",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.25,
        1.3,
        1.35
      ],
      "source": {
        "publisher": "Wilson",
        "title": "Wilson Sensation product page",
        "url": "https://www.wilson.com/en-us/product/sensation-16-set-rz94090",
        "accessedDate": "2026-10-03",
        "quotedText": "Sensation contains highly elastic nylon fibers ... This string features two outer wraps applied in opposite directions to improve durability. Specs: Gauge 16, mm 1.3; 17 page (wr8304100): mm 1.25; 15 page (wrz9409): mm 1.35."
      }
    },
    {
      "id": "wilson-sensation-control",
      "brand": "Wilson",
      "model": "Sensation Control",
      "material": "multifilament",
      "construction": "Nylon fiber core wrapped in liquid crystalline polymer ribbons",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.3
      ],
      "source": {
        "publisher": "Wilson",
        "title": "Wilson Sensation Control product page",
        "url": "https://www.wilson.com/en-us/product/sensation-control-16-set-rz94120",
        "accessedDate": "2026-10-03",
        "quotedText": "Featuring a nylon fiber core wrapped in liquid crystalline polymer ribbons, Sensation Control delivers a comfortable feel with increased firmness. Specs: Gauge 16, mm 1.3."
      }
    },
    {
      "id": "wilson-synthetic-gut-power",
      "brand": "Wilson",
      "model": "Synthetic Gut Power",
      "material": "syntheticGut",
      "construction": "Solid nylon core with high-energy wraps",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Wilson",
        "title": "Wilson Synthetic Gut Power product page",
        "url": "https://www.wilson.com/en-us/product/synthetic-gut-power-16-set-rz94510",
        "accessedDate": "2026-10-03",
        "quotedText": "Synthetic Gut Power utilizes a solid core nylon string for crisp feel and control. High energy wraps increase responsiveness. Specs: Gauge 16, mm 1.3; 17 page (rz94540): mm 1.25."
      }
    },
    {
      "id": "yonex-poly-tour-fire",
      "brand": "Yonex",
      "model": "Poly Tour Fire",
      "material": "polyester",
      "construction": "Polyester monofilament with SIF technology and HR elastomer",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.2,
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Yonex",
        "title": "Yonex Poly Tour Fire product page",
        "url": "https://us.yonex.com/products/polytour-fire-125-set",
        "accessedDate": "2026-10-03",
        "quotedText": "Material POLYESTER (MONOFILAMENT) Length 12m Gauge 16L (1.25mm) Tech Specs SILICONE OIL INFUSED FILAMENT (SIF) TECHNOLOGY, HR ELASTOMER. Sibling pages list 17 (1.20mm) and 16 (1.30mm)."
      }
    },
    {
      "id": "yonex-poly-tour-force",
      "brand": "Yonex",
      "model": "Poly Tour Force",
      "material": "polyester",
      "construction": "Polyester monofilament",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.2,
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Yonex",
        "title": "Yonex Poly Tour Force product page",
        "url": "https://us.yonex.com/products/polytour-force-125-set",
        "accessedDate": "2026-10-03",
        "quotedText": "Material POLYESTER (MONOFILAMENT) Length 12m Gauge 16L (1.25mm). Sibling pages polytour-force-120-set and -130-set list 17 (1.20mm) and 16 (1.30mm)."
      }
    },
    {
      "id": "yonex-poly-tour-pro",
      "brand": "Yonex",
      "model": "Poly Tour Pro",
      "material": "polyester",
      "construction": "Polyester monofilament with Silicone Oil Infused Filament (SIF) technology",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.15,
        1.2,
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Yonex",
        "title": "Yonex Poly Tour Pro product page",
        "url": "https://us.yonex.com/products/polytour-pro-125-set",
        "accessedDate": "2026-10-03",
        "quotedText": "Material POLYESTER (MONOFILAMENT) Length 12m Gauge 16L (1.25mm) Parent SKU PTGP125 Tech Specs SILICONE OIL INFUSED FILAMENT (SIF) TECHNOLOGY. Sibling set pages polytour-pro-115/120/130-set list 18 (1.15mm), 17 (1.20mm) and 16 (1.30mm)."
      }
    },
    {
      "id": "yonex-poly-tour-rev",
      "brand": "Yonex",
      "model": "Poly Tour Rev",
      "material": "polyester",
      "construction": "Polyester monofilament with SIF technology",
      "shape": "Octagonal",
      "coating": null,
      "gaugesMm": [
        1.2,
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Yonex",
        "title": "Yonex Poly Tour Rev product page",
        "url": "https://us.yonex.com/products/polytour-rev-125-set",
        "accessedDate": "2026-10-03",
        "quotedText": "Its 8-sided shape grabs the ball for intense bite ... Material POLYESTER (OCTAGON MONOFILAMENT) Length 12m Gauge 16L (1.25mm) Tech Specs SILICONE OIL INFUSED FILAMENT (SIF) TECHNOLOGY. Sibling pages list 17 (1.20mm) and 16 (1.30mm)."
      }
    },
    {
      "id": "yonex-poly-tour-spin",
      "brand": "Yonex",
      "model": "Poly Tour Spin",
      "material": "polyester",
      "construction": "Polyester monofilament with SIF technology",
      "shape": "Pentagonal",
      "coating": null,
      "gaugesMm": [
        1.2,
        1.25
      ],
      "source": {
        "publisher": "Yonex",
        "title": "Yonex Poly Tour Spin product page",
        "url": "https://us.yonex.com/products/polytour-spin-125-set",
        "accessedDate": "2026-10-03",
        "quotedText": "Material POLYESTER (PENTAGON MONOFILAMENT) Length 12m Gauge 16L (1.25mm) Tech Specs SILICONE OIL INFUSED FILAMENT (SIF) TECHNOLOGY. Sibling page polytour-spin-120-set lists 17 (1.20mm)."
      }
    },
    {
      "id": "yonex-poly-tour-strike",
      "brand": "Yonex",
      "model": "Poly Tour Strike",
      "material": "polyester",
      "construction": "Polyester monofilament with SIF technology",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.2,
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Yonex",
        "title": "Yonex Poly Tour Strike product page",
        "url": "https://us.yonex.com/products/polytour-strike-125-set",
        "accessedDate": "2026-10-03",
        "quotedText": "Material POLYESTER (MONOFILAMENT) Length 12m Gauge 16L (1.25mm) Tech Specs SILICONE OIL INFUSED FILAMENT (SIF) TECHNOLOGY. Sibling pages list 17 (1.20mm) and 16 (1.30mm)."
      }
    },
    {
      "id": "yonex-rexis-comfort",
      "brand": "Yonex",
      "model": "Rexis Comfort",
      "material": "multifilament",
      "construction": "Nylon multifilament with FORTIMO elastic polyurethane; FRF and plasma bonding",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Yonex",
        "title": "Yonex Rexis Comfort product page",
        "url": "https://us.yonex.com/products/rexis-comfort-125-set",
        "accessedDate": "2026-10-03",
        "quotedText": "Material NYLON (MULTIFILAMENT), FORTIMO Length 12m Gauge 16L (1.25mm) Tech Specs FUSION OF RESIN FILAMENT (FRF), PLASMA BONDING, FORTIMO. Sibling page rexis-comfort-130-set lists 16 (1.30mm)."
      }
    },
    {
      "id": "yonex-rexis-feel",
      "brand": "Yonex",
      "model": "Rexis Feel",
      "material": "multifilament",
      "construction": "Nylon multifilament with rubber polymer capsule and FORTIMO; FRF and plasma bonding",
      "shape": null,
      "coating": null,
      "gaugesMm": [
        1.25,
        1.3
      ],
      "source": {
        "publisher": "Yonex",
        "title": "Yonex Rexis Feel product page",
        "url": "https://us.yonex.com/products/rexis-feel-125-set",
        "accessedDate": "2026-10-03",
        "quotedText": "Material NYLON (MULTIFILAMENT), RUBBER POLYMER, CAPSULE, FORTIMO Length 12m Gauge 16L (1.25mm) Tech Specs FUSION OF RESIN FILAMENT (FRF), PLASMA BONDING, FORTIMO. Sibling page rexis-feel-130-set lists 16 (1.30mm)."
      }
    }
  ]
}