This injection molded 61-key keyboard case is a part of the i-Series of waterproof cases. i-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 stainless steel molded-in hinge, patented “trigger release” latch system, TSA accepted and approved locks, comfortable, snap-down rubber over-molded cushion grip handle, secure stacking, and automatic ambient pressure equalization valve (MIL-STD-648C) all contribute to its military grade design.The 3i-4214-KBD 61-note keyboard features a combination foam/cleat interior, which holds the instrument securely during transport. Adhesive backed foam in the lid also secures the keyboard.This case features built-in wheels, offering tilt-and-go transport, and is water resistant making it excellent protection for your keyboard. • Ultra high-strength polypropylene copolymer resin • UV, solvent, corrosion and fungus resistant (MIL-STD-810F) • Complete gasket seal makes these cases absolutely watertight (MIL-STD-C-4150J) • Automatic ambient pressureequalization value (MIL-STD-648C & IP67) • Resistant to corrosion and impact damage • Continuous molded-in hinge • Patented “trigger release” latch system • TSA approved locks • Rubber over-molded cushion grip handle • Corner cleats to secure keyboard • Locking loop to accept a customer supplied lock