Lldpe Pond Liner Pond Liners 15x20 Ft 20 Mil Fish Liner Fish Pond Liner For PondPremium LLDPEHigh TensileExcellent FlexibilityNo LeakageLong LifespanWidely UsedThickness: 20 Mil / 0.5 mm, Size: 15 ft x 20 ft / 4.6 m x 6 m, Color: Black, Material: LLDPE, Lifespan: 10-50 years