SKB 3I Series Injection Molded Mil-Standard Waterproof Cases are molded of ultra high-strength polypropylene copolymer resin, featuring a gasketed, water and dust tight, submersible design (MIL-C-4150J) that is resistant to corrosion and impact damage. Features a molded-in hinge, patented “trigger release” latch system, comfortable, snap-down rubber over-molded cushion Features Ultra high-strength polypropylene copolymer resin UV, solvent, corrosion and fungus resistant (MIL-STD 810H) Complete gasket seal makes these cases absolutely watertight (MIL-STD 810H) Automatic ambient pressure equalization value (MIL-STD 810H) Resistant to corrosion and impact damage Continuous molded-in hinge Trigger Latch® System Rubber over-molded cushion grip handles Industrial strength injection molded pull handle In-line skate style wheels for easy transport TSA accepted key locking latches are available Stainless steel locking loops to accept a customer supplied lock