Package Includes: you will get a pond liner, which size is 15 x 15 Ft, 40Mil and holds up to 400 gallons; Especially designed for small ponds, also you can cut to any size you need; Easy installation, no tools requiredGuard Your Pond: the pond liner prevent harmful substances in the soil from penetrating into the pond, avoid pollution of water resources, creating a safe and healthy environment for plants; Ideal for your water features, pond pumps, filters, and more with the liner in placeReliable Material: our black pond liner is made of EPDM material, which has good softness, extensibility, UV and puncture resistant. It can withstand extreme weather conditions, more strong, tear resistant and puncture resistant, can be applied for many years, safe for your fish and plantEasy To Clean: the pond liner provides a flat surface for your pond, reducing the soil accumulation; It also effectively prevents harmful substances in the soil from penetrating into the pond and contaminating the water, allowing you to clean the pond easily; In order to increase its service life, you can add a layer of round pebbles before laying the pond liner in placeWide Application: the thick pond liner has waterproof and anti leakage function, suitable for fish/ koi ponds, water features, retention ponds, fountains, backyard waterfalls and water gardens; Also applied in construction, agriculture, surface protection applications, covers of all sorts, tarps and much more, Real material EPDM material