Features1Made of aluminum alloy material, which has the characteristics of light weight, high strength, rust resistance and durability 2Adopting antirust and anticorrosion anodic oxidation treatment, the surface color is not easy to fall off 3The package contains 1 sprocket wheel, 2 sprocket covers, suitable for most 11T bicycles, giving you a good experience 4Simple to use, easy to install, you can use the bike sprocket with confidence, which can meet your needs well 5The necessary replacement parts for bicycles, providing an accessory for your bicycle to restore your equipment to normal working conditionSpecificationItem Type: Bike SprocketProduct Parameters: Inner Diameter Approx. 8.8mm/0.34inOuter Diameter Approx. 43.4mm/1.71inThickness Approx. 0.6cm/0.24inScrew Hole of Rear Derailleur: Approx. 8.9mm/0.35inGland Hole Size: Approx. 0.5cm/0.20inPackage List1 x BikeSprocket2 x Sprocket Cover