SKB Injection Molded case w/foam for (16) Mics w/storage compartment Ultra high-strength polypropylene copolymer resin UV, solvent, corrosion and fungus resistant (MIL-STD-810F) Complete gasket seal makes these cases absolutely watertight (MIL-STD-C-4150J) Automatic ambient pressure equalization value (MIL-STD-648C & IP67) SKB iSeries Injection Molded case w/foam for (16) Mics w/storage compartment Resistant to corrosion and impact damage