Inexpensive solution for lining shower stalls, saunas, floor drains, or sunken tubs. PVC flexible shower pan liners have been successfully used for many years in place of sheet lead, copper, or hot mop shower pan linings. Liner marked in 6″ increments for ease of measuring. Superior cold weather characteristics. UPC, SBCCL, and BOCA listed. Conforms with ASTM Specification D4551. 40 mil. gray kit with dam corners. 5′ x 6′.