Introduced in 2011 the Blagdon Ultimate Pond Lining System has proven to be a popular choice. The lining system consists of a top quality PVC pond liner along with underlay of matching size (with 20cm overlap). This liner system carries a Lifetime Guarantee from the manufacturer. The liner in this set is 3.5m x 3.0m (11’6″ x 10′) and the pond liner underlay included is sized 3.9m x 3.4m (12′ 8″ x 11′ 3″).