Galvanized steel shelves, adjustable on 4-3/4"W centers, support 350 lbs. Galvanized steel leveling legs. Aerosol Can Safety Cabinets feature internal and external welded 18-ga. steel double-wall panel construction with 1-1/2"W air space. 2"H raised leakproof sill. 2"H vent with fire baffle and cap. Ground connection. Made in the USA.