SKB 3I Series Injection Molded Mil-Standard Waterproof Cases are molded with impact resistant, ultra high-strength polypropylene copolymer resin that has been tested to be over 2 ½ times stronger than the competition. Specifications (MIL-C-4150J, IP67, and MIL-STD 810F). The waterproof, airtight and submersible design is resistant to corrosion and impact damage. Durable collection is built for hard-knocks protection and includes stackable models that are available empty, with Pick ‘N’ Pluck foam, with movable dividers, and/or padlock provisions and wheels. All cases include multiple snap-down rubber over-molded cushion grip handles and SKB's patented trigger latches. If locking latches are needed, the latches can be easily switched to a TSA locking trigger latch.