The SKB 3i1813-7-TMIX waterproof TouchMix 8 or 16 case is constructed of molded high-strength polypropylene copolymer resin, with a gasketed water- and dust-tight design that's highly impact- and corrosion-resistant. The SKB 3i1813-7-TMIX includes a continuous molded-in hinge, a trigger release latch system, an over-molded rubber grip handle for comfort, and an automatic ambient pressure equalization valve. Customized puzzle foam with space for your power supply is included.