This is a 20 tooth 48 pitch pinion gear.
This is the gear that attaches directly to the motor shaft.
One 20T 48P pinion gear
One 4-40 set screw
Installation onto 1/8" standard motor shaft.
This pinion can be used on many vehicles or other applications
requiring a 48 pitch pinion gear.
See subs for pinion gears with a different number of teeth.