Smartline Caribbean Round or Oval Liner | 52-Inch Wall Height | Beaded Style | Designed for Steel Sided Above-Ground Swimming Pools (20 Gauge, 24' Round) Will work with 52-inch constant depth swimming pools. The high temperature curing, computer controlled process insures that 100% of the material is Vulcanized to the highest possible tolerances. Vacuum Sealing, high volume air pumps combined with electronic air filter remove all impurities before bonding. Lap welded seams, unlike butt-welded seams; reduce both lateral and vertical tension. 20 gauge liners are backed by a 20 year limited warranty.