Traxxas 4995 Primary Gears, Forward 28T, Reverse 22T, Revo Primary gear set forward (28-T)/ reverse (22-T) Includes set screw yoke pin, M3/12 (1)/ 5x10x0.5mm PTFE-coated washer (1) Use Traxxas stock and hop-up replacement parts to get the most out of you Traxxas RTR vehicles This product is made from high quality materials and designed for lasting performance This is for use on RC vehicles such as the Traxxas Revo; consult your user's manual for exact parts listings