This Quality Pond Liner from PondXpert is guaranteed for 40 years. Buy with confidence as this \'Flexiliner\' brand of pond liner has been used in the successful installation of over 100,00 ponds across the world since 2006. This pond liner already offered best value-for-money, now with FREE Underlay this really is a fantastic deal. Large flexible liner sized 11 x 7m (36\' x 23\') can be used to create a large pond with maximum dimensions 8 x 4 x 1 metres (LWD) (26\' x 13\' x 3\' 3\").