Each of these Nexel brand four-shelf wire racks are coated with NEXGard, an antimicrobial agent that protects against rust, corrosion, and the build up of bacteria, mold, and mildew that could deteriorate your shelving. NSF approved and designed to handle extreme environments, the metallic blue wire shelves featured here are perfect for dry, wet, cooler, and freezer storage. All Nexelon wire shelving is backed by a lifetime warranty against rust and corrosion.