The Challenger injection series rack cases are made from an extremely tough Polypropylene Copolymer, these cases are crush resistant and virtually indestructible. This rugged 8u rack case features a gasket seal, which makes it Airtight and Watertight. This state-of-the-art airline-friendly case is a lightweight design that provides ultimate protection to your gear. The Challenger injection series rack cases are supplied with rack fixings and feature stacking location feet and are available with an optional Wheel Board with 4" Wheels, x2 of which are braked.