For decades, SKB has been the most innovative manufacturer of top-quality cases and accessories. Famous for their unwavering attention to quality and detail, purchasing an SKB case is sure to provide the most service life of any case on the market. So much so...That SKB offers their limited lifetime Warranty on their cases. Buy SKB...Buy with confidence. 3I Series injection molded waterproof cases are constructed of Ultra high-strength polypropylene copolymer resin and feature a gasketed, waterproof and airtight, submersible design (IP67) that is resistant to corrosion and impact damage. Its continuous Molded-in hinge, patented "trigger release" Latch system with TSA recognized and accepted locks, four reinforced locking loops for customer supplied locks, comfortable, snap-down rubber over-molded cushion grip handles, secure stacking, and automatic ambient pressure equalization valve (mil-stud-648c) all contribute to its military grade design.