caribbean unibead 21 round wall 52 above ground pool linerThis UniBead liner can be used either in a standard bead receiver or as a J hook style installation, making it a versatile choice for above ground pools. In a standard installation, the liner is secured directly to the top of the pool wall with a liner retainer. The stabilizer rail is then reinstalled to hold it firmly in place. This liner is made for constant depth pools with 52 inch walls and is suitable for flat bottom pools as well as cove bottoms