SKB 3I-2222-12BD Mil-Std Waterproof Case with Wheels and Gray 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) SKB Mil-Std Waterproof Case 22" x 22" x 12" w/wheels and Gray Dividers Patent pending "trigger release" latch system and molded-in cushion grip handle