Description: This is 36-tooth electric bicycle gears, fit for your electric vehicle needs Made from steel, these gears are sturdy and practical, fine workmanship and high precision, ensuring long term use It is an tool for all kinds of DIY cars, robots, and model making accessories The gear is with an 18-tooth sun gear and a 90-tooth internal ring gear, providing versatility in various applications It features a bearing model of 608 with an aperture size of 8mm, ensuring smooth handling and longevity Specification: Material: Steel Size Chart: Gear Diameter: 3.8cm/1.50inchClutch Diameter: 7cm/2.76inchHole Diameter: 1.5cm/0.59inchThickness: 1.3cm/0.51inch Package Includes: 1 Piece 38mm Nylon Gears Note: 1. Please allow slightly error due to manual measurement.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.3. Wish you a wonderful on line shopping! Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store