Traxxas 5378X Pivot Ball Caps and Dust Boots (set of four) Set of four pivot ball caps Includes dust boots, rubber (4)/ dust plugs, rubber (4)/ dust boot retainers, black (4), blue (4) 2 packages required to complete truck 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, consult your user's manual for exact parts listings