Product Material - The electric bicycle gear clutch kit is made of high quality steel and nylon 36T nsmiion, which is ble, practical and ble.Applicable models: Bafang engine gear clutch kit has 3 pieces of 36T nylon gears with bearings, and the 70mm clutch kit is suitable for Bafang engine metal solid gears.Applicable motors: The electric bicycle acceories nsmiion kit is suitable for 250W and 350W motors. It is mainly used for spare parts of mid-drive motors of electric bicycles.Gear and Clutch Dimensions: Nylon Gear Clutch Kit: Gear OD 38mm inch , Gear ID 8mm inch , Gear Thickne 12mm inch . Coupling OD 70mm/2.8 inch , Coupling ID 15mm/0.6 inch.[Good workmanship]The 36T electric bicycle motor gearbox clutch is exquisite in workmanship and exquisite in appearance, bringing you a good user experience.Color: As ShownMaterial: metalPackage Contents:1 x nsmiion gearOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.