Feature: 1. DURABLE MATERIAL: Made of aluminum alloy material, which has the characteristics of light weight, high strength, rust resistance and durability. 2. NICE CRAFT: Adopting anti rust and anti corrosion anodic oxidation treatment, the surface color is not easy to fall off. 3. SUITABLE FOR: 1 sprocket wheel, 2 sprocket covers, suitable for most 11T bicycles, giving you a good experience. The necessary replacement parts for bicycles, providing an accessory for your bicycle. 4. EASY TO INSTALL: Simple to use, easy to install, you can use the bike sprocket with confidence, which can meet your needs well. Specification: Item Type: Bike Sprocket Material: Aluminum Alloy Weight: Approx. 12g/0.4oz 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