These Are The RPM Quick Adjustable Spring Clip Losi/Nitro Slash 2WD 70322
These are made of injection molded black nylon. This is a quick system of adjusting the shock spring load. These replace the shock collars and are a superior upgrade to adjust the springs on shocks. Just add or remove clips and the changes are exact. The set comes with 16 spacer clips, four each of 1/16, 1/8, 3/16, and 1/4. This is enough to convert 4 shocks. They will work with any LOSI shocks.