Fits 55-gallon steel drum tops. Pre-cut with holes for 3/4 in and 2 in bungs. Eight layers of 100% polypropylene are thermally bonded: won't rip, tear or fray even when saturated. Exclusive dimple pattern speeds wicking of liquid throughout mat for faster, easier cleanup. Absorbs most common industrial liquids - oils, water, solvents, coolants and more. 25 pads per box.