Pro Casting Seat – Grey This seat mounts on any pedestal or mounting surface with a 5-1/4″ hole pattern. Features: High-impact marine-grade plastic frame Compression foam padding 28 oz. marine-grade vinyl Mildew-resistant and UV-treated Mounting screws are included Specifications: Dimensions: Height 5.25″, width 15″, depth 11″ Seating Depth: 8.5″ Seat Color: Grey