Features1Lightweight and Durable: This is a small bike sprocket, made of prime carbon steel, strong and durable. 2Gear Type: This gear has 10 teeth, the tooth pitch is 12.5mm, thickness is 7mm, inner hole 10x8.5cm. 3Easy to Install: These gears are small and light weight. Very easy to install and smooth performance. Can bring good experience. 4Suitable Scenario: This 10 tooth gear is suitable for ordinary bike chains and 1020 gear motors. 5Enhance the Working Experience: Old broken parts can be replaced with new gears to improve efficiency and work performance.SpecificationItem Type: Motor GearMaterial: Carbon SteelWeight: 51g / 1.80ozTooth Pitch: 1.25cm / 0.49inThickness: 0.7cm / 0.27inInner Hole: Approx. 10x8.5cm / 3.9x3.3inPackage List1 x Motor Gear