Slade Bump Cone/Cup Kit - your choice of Bump Cone with BCUP 2140 and Radius Retaining Washer. Cup is 2 1/4" deep and contains expansion of material under heavy loads. Designed for use on sprint car LR's or applications where the shock is run with the body down and the shaft up. Available for 1/2" and 9/16"/14mm shaft OD. Kits for 5/8" shafts coming soon.