For Tongsheng TSDZ2 Mid Drive Motor Engine Replacement Upgrade Metal Gear For 36V/48V E-Bike Parts

100% brand new and high quality.Made of high quality nylon materials, durable for long time usage.Nylon gears, including bearings for the TSDZ2 central motor.Wonderful gear replacement for mid drive motor engine.Easy to install and practical to use.Specifications:Inner diameter: 1.2cmSize:2.3 x 3.7cmColour:As shownMaterial:MetalPackage Contents:1 * GearOnly the above package content, other products are not included.Note: Light shooting 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.