SmartLine 21' Round Rock Island Overlap Above Ground Swimming Pool Liner — 48"/52" Height, 25 Gauge

Manufactured in the USA by top pool industry professionals for over 50 years, this SmartLine 21' Round Rock Island Overlap liner is made from 100% virgin vinyl and is 25 gauge. It features built-in UV protection and is formulated to resist punctures, cracks and fading. Each liner is hand-folded to allow easier installation and to reduce wrinkles or imperfections. Designed to tolerate harsh pool chemicals and prolonged sun exposure, it performs across a temperature range of -50°F to 130°F. A gasket set is included to help prevent leaks and fits all thru-wall skimmers and water return lines.