This is a high quality plastic pinion gear. Use it to get the desired speed and torque from your motor. It comes with a 6mm bore and a set screw which makes it easy to attach the gear to motors and axles of various diameters. Perfect for use in science projects, robotics, etc.
The outer diameter of this gear is 37 mm and has 25 teeth. It has a central hole/bore of diameter 6 mm. Fits perfectly with all our 6 mm axles and motors with 6mm shaft.