The gearbox gear made of high quality steel,durable and lasting-performance.
2 different gear teeth:28T, 23T(2P); Steel Shaft Size: Approx. 3 x 61mm Weight: 22g/Set
Easy to install,a great replacement part for the old or broken one.Please add lubricating oil, it can be reduce the friction between the metal gears, also the sound will be smaller when it is running.