Feature:1. Made of steel, the rear sprocket has the characteristics of toughness, durability and long service life to meet your needs2. Manufactured by professional technology, with stable performance and reliability to satisfy you, you can use the rear sprocket with confidence3. 420 sprocket can only be used with 420 type chain to ensure stable use effect and give you a good experience4. The diameter of the rear sprocket is 153mm/6.0in, the inner diameter is 48mm/1.9in, the the teeth number is 375. 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: Diameter Approx. 153mm/6.0in, Inner Diameter Approx. 48mm/1.9inNumber of Teeth: 37 Package List:1 x Tooth Rear Sprocket