SKB iSeries injection molded mil-standard waterproof cases are molded of Ultra high-strength polypropylene copolymer resin and feature a gasket-sealed, water and dust-tight, submersible design (mil-c-4150j). standard features also include a molded-in hinge, patented trigger release latch system, comfortable, snap-down rubber over-molded cushion grip handle, automatic ambient pressure equalization valve (mil-stud-648c), and resistance to UV, solvents, corrosion, , and impact damage (mil-stud-810.