SmartLine 21' Round River Slate Overlap Above Ground Swimming Pool Liner — 54" Height, 20 Gauge

Durable above-ground pool liner in River Slate pattern, designed for 21' round pools with an overlap installation and 54" height. Manufactured in the USA by pool industry professionals with over 50 years of experience, this SmartLine liner is made from 100% virgin vinyl for long-lasting performance. The 20 gauge material includes built-in UV protection and is formulated to resist punctures, cracks and fading. Each liner is hand-folded to make installation straightforward, helping prevent wrinkles and imperfections. It tolerates harsh pool chemicals and prolonged sun exposure across a wide temperature range (-50°F to 130°F). A gasket set is included to prevent leaks and fits all thru-wall skimmers and water return lines.