Firestone EPDM Pond Liner Roll - 40 x 50 ft. (45 mil.) - Underwater Warehouse
45 mil EPDM Pond Liner - 40 Ft. Width - PondUSA.com
Amazon.com : MYOYAY 40 Mil HDPE Rubber Pond Liner,13ft x 16.4 ft Pond Skins Liner Black Pond Liner for Small Ponds, Fish Ponds, Streams Fountains,Water Garden,Koi Ponds : Patio, Lawn & Garden