Trevi Cornelius Pools BLRC00215S 21' Round Steel Boreal Above Ground Pool Kit with 52" Royal Wall. Our pool brings unique style and beauty to your yard with design-inspired walls. Graystone and Cool Dark Gray colored coordinated posts and top ledges add a graceful touch. This new Cornelius pool look complements any backyard, looks beautiful year after year and adds value to your lifestyle. Our painted galvanized steel 7" ledges and 6" uprights with krystal kote sealant provides years of lasting beauty and quality. Unique interlocking resin caps, resin foot collars/connectors combo, painted galvanized steel top and bottom tracks with galvanized steel top connectors complete the look and adds strength for a pool that will last for summers to come.