21' Round Solid Blue Overlap 48/52in. Depth Above Ground Pool Liner. Overlap 21' Round Solid Blue 48/52 in.Depth Above Ground Pool Liner, 20 Mil. Protected against chemicals and UV fading. Overlap liners basically hang over the side of your above ground pool wall. The Liner is made with excess material so it can fit on the common 48" or 52" walls. Secured with Pool Coping Strips that hold the liner in place (not included). The excess material is then simply cut off. This listing is currently undergoing maintenance, we apologise for any inconvenience caused. This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Pools & Spas\Pool Equipment & Parts\Pool Liners". The seller is "intheswimpoolsupplies" and is located in this country: US. This item can be shipped to United States.