Placing inside ofenclosuresand providing a smooth, solid surface that keeps items from shifting or slipping through, these plastic wire shelf liners help you make the most out of your 24"d x 36"w wire shelving. Durable, 1/8" thick PVC construction Rounded corners position around posts Holds up to 300 lbs, evenly distributed Moisture and chemical resistant Liners are cut-to-order and arefinal sale. Please measure shelf prior to purchasing.