Rugged and tamper-resistant non-sparking aluminum locker resists corrosive outdoor elements. Wire mesh sides permit quick visual inspection of cylinders and prevents buildup of flammable gases. Pre-drilled anchor holes at each corner to accept 1/2" bolts for added security and stability. Horizontal cabinets include heavy-duty racks for non-roll cylinder storage. Doors accept padlock to prevent unauthorized entry. Ships fully assembled.