SpecificationsMaterial: 7075 aluminum alloy + stainless steelColor: SilverSleeve length: 108mm, diameter: 35mm; mandrel length: 65mm.The diameter of Star-Nut is 28.6mm and the length of Star-Screw is 30mm.Compatible: 22.2mm, 25.4mm, 28.6mm (7/8 ", 1", 1-1/8").Weight: 255g/ 0.56lb.FeaturesThe Headset Star-Nut Driveris suitable for front forks of aluminum alloy, steel and titanium alloy.Heat treatment, stronger hardness, polished nickel plating, better texture.3D sandblasting treatment, feel good, non-skidding.304 stainless steel screw, replaceable design, easy to use, longer life.Package includes:1 x Sleeve1 x Install Mandrel1 x Star-Nut1 x Star-ScrewNotice:The Headset Star-Nut Driveris suitable for front forks of aluminum alloy, steel and titanium alloy. Full carbon front fork is not applicable, please do not buy it by mistake.Farbetter has been committed to providing high-quality bicycle products. Have any questions, please contactus immediately so that we may resolve the issue for you.