The SKB iSeries 3i3021-18KC case is designed to safely transport your QSC KC12S subwoofer. Molded from high-strength, impact-resistant polypropylene copolymer resin, it features a watertight, dust-tight, submersible design with a gasket seal that meets rigorous MIL-STD 810H standards. Built-in skate-style wheels make transporting the case smooth and easy. The high-quality foam interior is precision cut-out to cradle the KC12S snugly, with additional space below to store cables and accessories. With its rugged construction and smart protective features, this case ensures your valuable KC12S sub arrives at gigs and sessions undamaged, allowing you to focus on delivering great sound.