SIMSpec Engineering 64p 40t Pinion

The SIMSpec 64DP gears are made of 7075 aluminum and are specially hardened. 

Easy installation and long service life
Hard anodized gear surface
Anti-bind treatment to lower the change of binding on the rotor shaft.
Suitable for 1/10 RC model car 3.175mm shaft brushless brush motor
Each gear is equipped with a machine screw