Features 1、Made of aluminum alloy material, which has the characteristics of light weight, high strength, rust resistance and durability 2、Adopting anti‑rust and anti‑corrosion anodic oxidation treatment, the surface color is not easy to fall off 3、The package contains 1 sprocket wheel, 2 sprocket covers, suitable for most 11T bicycles, giving you a good experience 4、Simple to use, easy to install, you can use the bike sprocket with confidence, which can meet your needs well 5、The necessary replacement parts for bicycles, providing an accessory for your bicycle to restore your equipment to normal working condition Specification Item Type: Bike Sprocket Product Parameters: Inner Diameter Approx. 8.8mm/0.34in Outer Diameter Approx. 43.4mm/1.71in Thickness Approx. 0.6cm/0.24in Screw Hole of Rear Derailleur: Approx. 8.9mm/0.35in Gland Hole Size: Approx. 0.5cm/0.20in Package List 1 x Bike Sprocket 2 x Sprocket Cover