Feature:1. Manufactured by professional technology, with stable performance and reliability to satisfy you, you can use the rear sprocket with confidence2. Made of steel, the rear sprocket has the characteristics of toughness, durability and long service life to meet your needs3. The diameter of the rear sprocket is 170mm/6.7in, the inner diameter is 52mm/2.0in, the the teeth number is 414. You should pay attention that 420 sprocket can only be used with 420 type chain, can't fit other chains5. Has a wide range of applicability, suitable for electric bicycles, karts, motorcycles, ATVs, four wheel off road vehicleSpecification:Item Type:Tooth Rear SprocketMaterial: SteelProduct Size: Approx. 170mm/6.7in Diameter, Approx. 52mm/2.0in Inner DiameterNumber of Teeth: 41 Package List:1 x Tooth Rear Sprocket