Traxxas 4122 Steel Clutch Bell, 22T Durable steel for long-lasting performance 22t clutch bell includes fiber washer and 2 E-clips Requires two #4611 ball bearings, 5x11x4mm Available in a variety of sizes to fine tune your truck's gear ratios 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 Traxxas RC vehicles, consult your user's manual for exact parts listings.