Our premium overlap all blue liners are with only the finest quality ingredients. The virgin vinyl used in manufacturing incorporates UV and algae inhibitors. The lap welded seams, sealing the 2000 series material, are the finest in the industry. Made for pools with up to 52" walls and constant depth floors.Features: Rugged lap-style seams will withstand even the harshest winter's These premium liners are manufactured to provide maximum protection from the sun's damaging rays Our color-fast liners will last longer and maintain their beautiful appearance for yearsSpecifications: Finest lap welded seams in the industry Algae inhibitors UV inhibitors Cold Crack rated to minus 25 degrees Virgin Vinyl Fits 48" and 52" pools 2000 series material