The Camco recycled rubber stabilizer jack pads help prevent jacks and stabilizers from sinking into soft ground. The flexible material is great for use on uneven surfaces such as gravel, tree roots, and rough earth because is absorbs uneven pressure instead of cracking or wobbling. Recycled rubber stabilizer jack pads are UV resistant, weather-proof, and constructed of recycled materials. Nests perfectly with most stack jacks. Each pad measures 6.5" x 9" X .75". Set of 4.