Trevi Cornelius Pools BYRC00215S 21' Round Bombay Hybrid Above Ground Pool with 52" Royal Wall and 7″ Extruded Resin Top Ledges. Our pool brings unique style and beauty to your yard with design-inspired walls. 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 extruded resin 7" ledges and 6" painted galvanized steel uprights with krystal kote sealant provides years of lasting beauty and quality. Unique interlocking resin caps, resin foot collars/connectors combo, injected resin top and bottom tracks and top connectors complete the look and adds strength for a pool that will last for summers to come