Little Giant SLB-1213-PW 400 Gallon Flexible Pond Liner – 12′ x 13′, for finised pond sizes 8′x6′x1.5′ (566276) 400 Gallon Flexible Pond Liner – 12′ x 13′ the PondWorks pond liner is a strong, 20-mil flexible material that allows for customization of size and shape. It’s durable, strong, lightweight and easy to maneuver. PondWorks liners are embossed to promote the growth of beneficial bacteria in your water garden. Every PondWorks liner comes with a 20-year warranty. Little Giant SLB-1213-PW 400 Gallon Flexible Pond Liner – 12′ x 13′, for finised pond sizes 8′x6′x1.5′ (566276) Features: * Ideal for 400 gallon ponds or finished pond dimension up to 8′L x 6′W x 1.5′D * Strong high-tech, lightweight 20 mil material with embossed surface doubles area for colonizing beneficial pond bacteria * Easy to install (install embossed side up) * Puncture and tear resistant * Designed for aquatic life * UV Resistant with 20 year warranty