iSeries 4909-5 Waterproof Utility Case with layered foam 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 grip handle, automatic ambient pressure equalization valve (MIL-STD-648C), resistance to UV, solvents, corrosion, fungus and impact damage (MIL-STD-810F). - Stainless steel locking loops for a customer supplied lock - Layered foam for added protection - Waterproof and dust tight design (MIL-C-4150J) - Molded-in hinge for added protection - Trigger release latch system - Snap-down rubber over-molded cushion grip handle - Ambient pressure equalization valve (MIL-STD-648C) - Resistant to UV, solvents, corrosion, fungus (MIL-STD-810F) - Resistant to impact damage (MIL-STD-810F)