Camcos RV Stabilizing Jack Pads help prevent jacks from sinking into the ground. They are compatible with stack jacks, fifth wheel stabilizers, swing down stabilizers and awning arms. Not intended for use with hydraulic jacks. Each pad features 6 1/2-inches x 6 1/2-inches of usable surface area. For convenient storage, they interlock and include a handy strap. Constructed of heavy-duty, UV stabilized polypropylene. Includes a set of (4) pads. Made in the USA.