The SKB 3I-1309-6B-E iSeries Injection Molded Mil-Standard Waterproof Cases are molded with ultra high-strength polypropylene copolymer resin, featuring a gasket-sealed, water and dust tight, submersible design (MIL-STD 810H) that is resistant to corrosion and impact damage. Standard features include a molded-in hinge, Trigger Latch System, snap-down rubber over-molded cushion grip handle, automatic ambient pressure equalization valve (MIL-STD 810H), and resistance to UV, solvents, corrosion, fungus and impact damage (MIL-STD 810H).