Leveling Block Caps fit on top of Camco leveling blocks to form a smooth surface without increasing the stack height. By distributing the weight of the vehicle more evenly, the caps help create a more stable, secure surface for jacks and stabilizers. The unique design lets you connect two blocks together if you only need one block of height, or stack on a single leveling block to create a stabilizing jack pad. Set of 4 caps. Distributes weight of vehicle more evenly Connect two blocks together to add height Stack on single leveling block to create jack pad | Camco Leveling Block Caps, Set of 4