With the addition of these white poly wire shelf liners, you won't have items wobbling or slipping through the gaps of your14"d wire shelving. Use for a solid, stable storage base that keeps everything securely in place. 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 and see Product Details section below for exact sizing. To accommodate accessories used on wire shelves, liners must be custom cut. Please note in order special instructions box at checkout if needed.