NSF APPROVED FOR WET OR DRY USE.NEXELATE® SILVER EPOXY WIRE SHELVING ADD-ON UNIT - 5 TIER - 72"W X 21"D X 74"H ADD-ON SHELVING UNITS ALLOW UNIT EXPANSION TO MAKE THE MOST OF STORAGE SPACE. Nexelate Silver Epoxy Wire Shelving Add-On Unit - 5 Tier - 72"W x 21"D x 74"H FEATURES: REINFORCED SHELVES WITH WELDED SURFACE RIBS FOR ADDED STRENGTH OPEN DESIGN TO MAXIMIZE AIR AND LIGHT CIRCULATION AND MINIMIZE DUST ACCUMULATION INCLUDES 5 SHELVES, 2 POSTS, SNAP-ON SLEEVES AND S-HOOKS TO JOIN UNITS SHELVES EASILY ADJUST WITHOUT TOOLS AT 1" INCREMENTS NSF APPROVED FOR WET OR DRY USE AGAINST RUST AND CORROSION.