Atlantic Flexible Hardscape Basins are the easiest way to waterproof your block installation. Reinforced 28mil PVC construction with fold out flaps and punched glue points anchor liner under capstones for security and durability. Unlike improvised EPDM liner basins, welded corner construction eliminates folds and wrinkles for a neat professional appearance. Basins are available in tan, grey and black to complement any surround up to eight-feet wide. Includes backing plates and bulkheads for submersible or external pumps. Use Cord Seal Fittings to pass cords. Perfect for Atlantic's Spillway, WaterWall and Wall Spout installations. Open basins not recommended for Colorfalls applications.