this is the Hot Racing 21t mod-1 pinion gear for use on 1/8 and 1/10 scale cars use mod 1 gear.
hardened steel construction
black in color
YOU WILL RECEIVE:
one 21t mod-1 pinion gear
one 4x4mm set screw
installation on the vehicle
length: 12mm (0.47")
inner diameter: 5mm (0.20")
description revised by: DB July 8, 2013