Used on the Ultima RB5 SP and RT5. Can also be used to upgrade the shocks on other kits including the Ultima SC and DB in the front. These are the 38mm long shock bodies and the set includes everything needed but the springs and shock fluid to build 2 shocks.The new Kyosho Velvet Coat Triple Cap Shocks feature a new and improved cartridge improving the oil seal and reducing stiction resulting in greatly improved shock action. Also featuring the newly released velvet coating on the shock body that reduces stiction and wear on the shock piston. Not only that they are absolutely beautiful! Upgrade your old Lazer shocks with this new design!