With these black poly wire shelf liners, your radius wire shelving goes from open to solid-surface storage in seconds. No more items shifting or slipping through the gaps - just effortless organization! Select the right size by matching the liner dimensions to the depth and width of your wire shelves. .025" thick polypropylene construction Moisture and chemical resistant Liners are cut-to-order and arefinal sale. Please measure shelves prior to purchasing. To accommodate accessories used on wire shelves, liners must be custom cut. Please note in order special instructions box at checkout if needed.