This Beckett Pond Pump is ideal for small ponds and small container gardens. This liner is made of Polyvinyl Chloride, which is great for fish ponds as it creates an environment for flora and fauna alike. The flexibility of the material allows for creative design. No maintenance required for lasting beauty. This makes a great foundation for any pond. This pre-cut piece measures 8 feet by 10 feet and is .5mm/20 mil thick. This product comes with a 15-year manufacturer's.