Smartline® 28' x 54 Round Overlap Above Ground Swimming Pool Liner - 25 Gauge. Whether installing for the first time or replacing an existing liner, the SmartLine® Overlap Liner offers durability while not breaking the bank.Pool height is determined by measuring the outside wall from the ground to underneath the top rail. Connection: Overlap - This type is the most common and simply folds over the corrugated metal wall and drapes down on the outside of the wall. The liner is held in place by plastic coping strips. You may wish to replace these if your old ones are brittle and dry. Please note that warranties are for product replacement only based on defective workmanship or materials. High-temperature curing, computer-controlled process ensures that 100% of the material is "Vulcanized" to the highest possible tolerances. Vacuum Sealed, high volume air pumps combined with electronic air filters remove all impurities before bonding. High-pressure heat bonding, computer balanced combination of high pressure and exact temperatures ensures a void-free permanent bond. The most technically advanced radio frequency vinyl welding reduces the chance of cold spots in the seaming process. Hand folded flat, to reduce wrinkles, unlike automated packers that twist and force the liner into the box which can cause permanent creasing. Most Common Type of Liners. Overlap: This type is the most common and simply folds over the corrugated metal wall and drapes down on the outside of the wall. Please make sure you measure your swimming pool twice before purchasing. Lastly, none of our liners will fit Intex, Bestway, Coleman, or any soft-sided swimming pool. This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Pools & Spas\Pool Equipment & Parts\Pool Liners". The seller is "savemoreonpoolsupplies" and is located in this country: US. This item can be shipped to United States.