Two 1”x 1/8” thick 303 stainless steel washers. With the slip rings add to the machined washers for better grip on the bushing and base plate & sticker two lock washers. STEP it up washer, add’s 2* Degree’s on a lower angle base plate truck. Rise up a favor shorter bushing. Use as a dead rear on a top bushing. More rebound quicker snappier turns. Add the one smaller washers are made in Germany, add under top lock nuts. For add inner lock, to the top lock nut. Added absorption control.