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, patent pending trigger release latch system, comfortable, snap-down rubber over-molded cushion grip handle, automatic ambient pressure equalization valve MIL-STD-648C, resistance to UV, solvents, corrosion, fungus and impact damage MIL-STD-810F.