iSeries Injection Molded Mil-Standard Waterproof Cases are molded of ultra high-strength polypropylene copolymer resin, featuring a gasket-sealed, waterproof and dustproof, 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). Ideal for everyday equipment, the Medium iSeries collection balances portability and capacity for field gear, audio equipment, and mid-sized tools.