Heavy-gauge steel with tamperproof hinges. Vertical louvers provide ventilation. Full-length door stiffeners add rigidity and deaden sound when opening/closing. Recessed black metal handles on single and triple tier lockers. Padlock hasps on each door. Includes number plates for locker identification. Optional Locker Base raises lockers 6" off floor for easier access to bottom units. Multiple rows of lockers can be ganged with standard nuts and bolts (not incl.). Each compartment: 12w x 18d x 12h. Overall 72" high.