All KOUDX cabinets are built to the highest quality specifications.The cabinets comply with current OSHA regulations and are designed in accordance with the standards of NFPA Code 30. Key Features: Over 1.2mm thick, fully welded,construction holds squareness for longer life, offering greater protection in a fire. Durable lead-free epoxy/polyester powder-coat finish provides excellent chemical resistance. Double wall construction with 1-1/2" (38mm) insulating air space for fire resistance. Fusible link assembly on self-closing models. Non-sparking 3-Point Self-latching Doors. 2"(53mm) leakproof sill to contain leaks. Full length, heavy-duty piano hinges. Two 2" vents with flash arrestors. Static grounding connection.