● Portable design: The gear is small in size, light in weight and easy to carry ● This gear with 36 teeth can help you better control your products, with fine workmanship and long service life ● This gear is nylon + metal, which is, not easy to deform, and can be used with confidence ● Electric bicycle motor gear, toothed planetary gear, suitable for motor ● Time-saving and labor-saving: The gear is, no complicated operations, time-saving and labor-saving, Manufacturer: Hsyzygian