tuning spacers that install inside your shocks to reduce shock travel and lower ride height. They're designed specifically around the Traxxas Slash Modified using GTR shocks with 3.5mm shock shafts, but can also work on other RC platforms that use the same shaft diameter.
Fits 3.5mm shock shafts, including Traxxas GTR shocks
Reduces available shock stroke internally
Helps lower the chassis without changing shock bodies