Specification Brand : Yctze BulletPoint1 : Easy to install, no complex required, save time and effort. BulletPoint2 : Make sure this fits by entering your model number. BulletPoint3 : Replace old accessories, can help you better control your products, fine workmanship, ensuring long product life. BulletPoint4 : Replace old accessories, can help you better control your products, fine workmanship, ensuring long product life. BulletPoint5 : 【Effortless & Timeness】: Easy to install, no complex required, save time and effort. ItemName : Yctze 3PCS Professional 36 Tooth Nylon Planetary Gear for EBike Motor, Electric Bike Motor Repair Gears Clutch, 38mm Electronics Motor Gear Accessory ItemPackageDimensions_Height : 2 centimeters ItemPackageDimensions_Length : 9 centimeters ItemPackageDimensions_Width : 8 centimeters ItemTypeKeyword : worm-gears Manufacturer : Yctze ModelNumber : Yctzeo3rgbumk49 NumberOfItems : 1 PartNumber : Yctzeo3rgbumk49 ProductDescription : 1. Made of nylon material, sturdy and , not easy to deform. 2. Improve the control performance of the product to help repair the expensive equipment. 3. Replace old accessories, can help you better control your products, fine workmanship, ensuring long product life. 4. Easy to install, no complex required, save time and effort. 5. Professional manufacture, good performance and high reliability.