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. The 3I Series of waterproof cases are the perfect solution for storing and transporting your delicate electronics, A/V equipment, microphones, mixers, cables, computers or percussion and music accessories. Most sizes are available with a variety of interiors to accommodate the needs of the Traveling musician. 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, patent pending "trigger release" Latch system, comfortable, snap-down rubber over-molded cushion grip handle, secure stacking, and automatic ambient pressure equalization valve (mil-stud-648c) all contribute to its military grade design.