This is a set of replacement Kyosho Shock Cartridge Bushings, and are intended for use with the triple cap shocks on the Kyosho ZX5, RB5 and RT5 1/10 electric vehicles. These are the bushings that align the shaft in the cartridge as well as hold the shock seals. This package includes 2 small bushings and 2 large bushings, to replace the bushings in two shocks.