The narrow SKB iSeries 76-Note Keyboard Case with Think Tank Interior is constructed from an injected mold of ultra-high-strength polypropylene copolymer resin and features a gasket seal, making it waterproof and resistant to UV, solvents, corrosion, fungus, and impacts. The military-grade SKB iSeries 76-Note Keyboard Case with Think Tank Interior features a fully customizable.