THEY HAVE A VENTED OPEN GRID SURFACE THAT IS SMOOTH AND CREVICE-FREE.
SHELVING UNIT INCLUDES 4 POSTS WITH LEVELING FEET, 5 PLASTIC MAT SHELVES, AND PLASTIC SNAP ON SLEEVES TO SECURE SHELVES TO POSTS.FEATURES: POLYMER COMPOSITION SHELF MATS OPEN DESIGN TO MAXIMIZE AIR AND LIGHT CIRCULATION AND MINIMIZE DUST ACCUMULATION INCLUDES 4 POSTS, 5 SHELVES, AND SNAP ON SLEEVES SHELVES EASILY ADJUST WITHOUT TOOLS AT 1" INCREMENTS NEX GARD ® ANTI-MICROBIAL AGENT NSF APPROVED FOR WET OR DRY USE AGAINST RUST AND CORROSION Nexel , Nexelite reg , 5 Tier, Vented Plastic Mat Shelving Unit, 48"W x 18"D x 74"H NEX GARD ®, AN ANTI-MICROBIAL AGENT, PROTECTS THE EPOXY COATING FROM BACTERIA, MOLD, AND MILDEW THAT CAUSES ODORS AND PRODUCT DEGRADATION.