Medallion Pools WG1442-8SKW 8' x 42" Plain Panel Wall with Inground Wide Mouth Skimmer Cutout at 5' Steel - Create the inground pool of your dreams with this Plain Panel Wall with Inground Wide Mouth Skimmer Cutout. It is constructed of durable 14-gauge galvanized steel. Steel wall panels are an ideal choice for inground pools due to their natural malleability. Steel is able to handle changing conditions while remaining strong and intact.