4-Tier UltraZinc NSF Steel Wire Shelving, 14x36x54. Organize your home or office with Seville Classics' 4-Tier Shelving Systems. This system is constructed from industrial-strength steel and features UltraZinc plating, which provides the same corrosion resistance and a similar shine to chrome plating. Our shelves have passed NSF certification and are suitable for commercial, home and office. Shelves hold up to 350 lbs. each. Industrial-strength steel wire construction for multipurpose storage. Zinc plating provides necessary corrosion resistance in dry environments. NSF certified for commercial, residential and office environments. Shelves adjust at 1" increments. No tools required for assembly. Limited 10 year warranty. Zinc.