HDPE (High Density Polyethylene) Plastic Sheet 1/2" x 12" x 24" Natural : Industrial & Scientific - Amazon.com
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Amazon.com : HORV Pond Liner, 8 mil HDPE Black Pond Skins Liner for Small Ponds, Fish Ponds, Streams Fountains, Water Garden, Waterfall Pond, Garden Pool Flexible Membrane : Patio, Lawn & Garden