SmartLine 21' Round Unibead Above-Ground Pool Liner — Boulder Swirl Pattern, 52" Height, 20 Gauge

Replacement liner for 21' round above-ground pools featuring the SmartLine Unibead system and Boulder Swirl design. Manufactured in the USA by seasoned pool industry professionals with over 50 years of experience. Made from 100% virgin vinyl at 20 gauge, the liner includes built-in UV protection and is formulated to resist punctures, cracking and color fading. Each liner is hand-folded for an easier, wrinkle-free installation. Designed to tolerate harsh pool chemicals and prolonged sun exposure, it performs across a wide temperature range from -50°F to 130°F. A gasket set is included to help prevent leaks and fits all thru-wall skimmers and water return lines.