SKB Equipment Case, 20 1/2 x 15 1/2 x 10 with Wheels and Dividers Ultra high-strength polypropylene copolymer resin UV, solvent, corrosion and fungus resistant (MIL-STD-810F) Complete gasket seal makes these cases absolutely watertight (MIL-STD-C-4150J) Automatic ambient pressure equalization value (MIL-STD-648C & IP67) Locking loop to accept a customer supplied lock