Originally, the spacers were for the U-plate on the XTI/WC 1/12th cars. We are now using these to shim the new CK25AR pivot. The 2.4mm thickness proves to be a good shim distance for the AR (adjustable roll-center) pivot on the CK25-AR. 4 pieces, #4 hole and 3/32 (2.38 mm) thick
