Heavy-duty 16 gauge door frame for added durability. Heavy-duty knuckle hinges provide added strength and security. Integrated levelers compensate for uneven floors. Louvered back panel provides cabinet ventilation. Three point door locking mechanism for maximum security. Reinforced doors provide strength & durability. Built-in shelf support tabs secure shelves tightly to cabinet without clips or added parts, Heavy duty leaf hinges assure doors stay aligned. Raised base keeps materials out of harm???s way. Meets ANSI BIFMA test standards. Shelf capacity ??? 18?? holds 150 lbs. evenly distributed, 24?? holds 200 lbs. evenly distributed.