ZINC CHROMATE WIRE SHELVES FEATURE A PATENTED TRUSS REINFORCED DESIGN FOR EXTRA STRENGTH AND GREATER CAPACITIES OPEN SHELVING PERMITS SPRINKLER AIR AND LIGHT PENETRATION AND MINIMIZES DUST ACCUMULATION SHELVES EASILY ADJUST WITHOUT TOOLS AND ALIGN ACCURATELY AT 1"" INCREMENTS NSF APPROVED FOR DRY USE STARTER UNIT INCLUDES 4 POSTS WITH LEVELING FEET 4 WIRE SHELVES AND PLASTIC SNAP ON SLEEVES TO SECURE SHELVES TO POSTS EASY ASSEMBLY