THICK-WALL, chemical-resistant polyethylene construction won't bend or warp RIBS ON BOTTOM OF TRAY add strength and elevate parts to keep them away from trapped liquids IDEAL FOR TEMPORARY STORAGE of small containers that may leak or drip liquids onto the floor STACKABLE SPILL CONTAINMENT TRAYS store easily when not in use SUMP CAPACITY is 9 gallons INTERIOR BOTTOM DIMENSIONS are 48"L x 24"W