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. Padlock hasp on each door. Includes number plates for locker identification. Shown with three optional bases, (TNN110348), sold separately, which raise lockers 6" off floor for easier access to bottom units. Multiple rows of lockers can be ganged with standard nuts and bolts (not included). Each compartment: 12w x 18d x 36h with hooks. Two-point locking system provides security. Overall 72" high. (Cannot ship UPS.)