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

Fits 21' round above-ground pools — SmartLine Boulder Swirl overlap liner, 20 gauge and sized for 48"/52" wall heights. Proudly manufactured in the USA by leading pool industry professionals with over 50 years of experience. Constructed from 100% virgin vinyl for superior resistance to punctures, cracking and fading; built-in UV protection helps preserve appearance. Each liner is hand-folded to allow smoother, wrinkle-free installation. Formulated to tolerate common pool chemicals and prolonged sun exposure, it performs reliably in temperatures from -50°F to 130°F. Includes a gasket set to prevent leaks and compatible with all thru-wall skimmers and water return lines.