DiversiTech's most popular pad due to its rugged durability, strength, and clean looks. Post-consumer recycled polypropylene for lightweight yet more durable heft that is unaffected by UV or weather Generous individually engineered ribbing for optimum self-levelling ground support Drillable for securing unit Does not crack, flake, or warp when tested per ASTM D2299 with refrigerants, synthetic canine urine, compressor oil or salt solution (of 20% by volume)