Medallion Pools WG1442-8QN 8' x 42" Quick Niche Wall with Cutout Center Galvanized Steel - Create the inground pool of your dreams with this Quick Niche Wall with Cutout Center. It is constructed of durable 14-gauge galvanized steel. Steel walls are an ideal choice for inground pools due to their natural malleability. Steel is able to handle changing conditions while remaining strong and intact.