【19T 17T 15T Pinions Gear for Choices】Inner diameter: , also comes with coupler to convert 3 pinions apertures to Suitble for 5mm and shaft motors. We provide 3 different teeth pinion gear(19T/17T/15T) to make you more choice in gear ration.
【More Durable】:The Spur Gear upgrades to more durable. Made of More Hard Steel tough molded composite material for long-lasting durability .is with precision manufactured gear teeth for smooth, consistent performance,they works with low noise.
【High precision】:The Center Drive Shaft made of 6061-T6 aluminum for long-lasting durability, provides ideal s for your kit supplied items!
【Easy to Install】:great for replace the old or broken part.Increase overall performance and durability of your RC car.