Refrigerator shelf is welded by steel wire of super quality, and hot-dipped by thermoplastic PE coating. (Polyethylene lightweight thermoplastic.It is made of low-carbon steel wire or stainless steel wire through cutting,bending, and welding.the surface treatment is powder painting ,PVC coated or polishing.The surface is smooth,Do not rust,Be anti-corrosive,Non-toxic,So it is be propitious to Hygienic and environmental protection.