SmartLine 21' x 42' Oval Boulder Swirl Overlap Above-Ground Pool Liner, 48"/52" Height, 20 Gauge

This SmartLine Boulder Swirl overlap liner is made for 21' x 42' oval above-ground pools and is 20 gauge with a 48"/52" wall height. Built from 100% virgin vinyl and finished with built-in UV protection, it resists punctures, cracks and fading. The liners are hand-folded to ensure an easier, wrinkle-free installation and a smooth, precise fit. Designed to withstand harsh pool chemicals and prolonged sunlight exposure, the material performs reliably across temperatures from -50°F to 130°F. Manufactured in the USA by top pool industry professionals with over 50 years of experience. A gasket set is included to help prevent leaks and fits all thru-wall skimmers and water return lines.