The 4U audio rack (19") features a lightweight yet extremely robust polyethylene construction and includes front and rear rack rails for flexible mounting and optimal weight distribution. The 7 mm thick, galvanized steel rails are bolted and can be replaced on site, making the rack ideal for intensive touring and rental use with high service demands. Heavy-duty twist locks secure the rack, while lockable lids provide additional protection against unauthorized access. Recessed side handles and a sturdy, extendable handle, combined with smooth-rolling rollerblade-style wheels, make the rack easy to maneuver as a trolley. This rack offers professional stability, low weight, simple maintenance, and maximum transport convenience.