Slade Bump BCAP 2140 Kit - your choice of Bump Cone with BCAP 2140 - upper and lower half conceal the bump cone, keeping it clean and out of sight. Capsule contains expansion of material under heavy loads. Designed for use with our Copperhead Double Adjustables where the shaft is mounted down. Available for 1/2" and 9/16"/14mm shaft OD. Kits for 5/8" shafts coming soon.