Double wall 18 gauge welded steel construction with 1-1⁄2” air space. Dual 2” capped vents with flash arrestors for external exhaust. 2” high leakproof door sill contains spills. Adjustable leveling feet. Locking handle with 3-point latch. Cabinet includes three 500 lb. capacity galvanized shelves, adjustable on 2-1⁄2” centers. Construction meets NFPA Code 30 and OSHA Standard 1910.106 for storage of Class I, II and III liquids. 40 gallon capacity