Vertical louvers provide ventilation. Full-length door stiffeners add rigidity and deaden sound when opening/closing. Padlock hasp on each door. Includes number plates for locker identification. Each compartment has hooks for hanging items. Two-point locking system provides security. Configure with optional base (sold separately) to raise locker 6" off floor for easier access to bottom unit. Multiple rows of lockers can be ganged with standard nuts and bolts (not included).