This is a set of optional ST Racing Concepts Aluminum CNC Machined Upper shock caps for Traxxas Vehicles. Increase durability on your Traxxas shocks with these aluminum CNC Machined upper shock caps. Intended for use with Slash/Bandit/Rustler/Stampede and Maxx trucks, as well as the Nitro Slash. These upper shock caps are designed to work and thread on easily with the newer ultra version of the Traxxas shocks (grey shock body). The outside of these caps are machined with grips for easier assembly and prevent slipping due to oil.