12-mil Black/White Supported PE Okaynomy-grade pond liners are made from ultra lightweight Polyethylene (PE) that has a reinforcement scrim embedded in the material to provide rip-stop in the event of a tear plus these liners are black on one side and white on the other (you choose which side faces up). 250 x 300. 60 x 200. 75 x 125. 250 x