Wise 8WD139 Series Plastic Folding Seats Are Built with Strong Plastic Injection Molded Frame. Wider Seat Pan provides Extra Comfort. Thick Foam Cushions with High Compression Foam Padding. Marine Grade UV and Mildew Treated Vinyl. Embossed Vinyl Seating Surface. Mounts to any BIA Standard 4 Bolt Pedestal System. Plastic Folding Seats Are Built with Strong Plastic Injection Molded Frame. Wider Seat Pan provides Extra Comfort. Thick Foam Cushions with High Compression Foam Padding. Marine Grade UV and Mildew Treated Vinyl. Embossed Vinyl Seating Wise 8WD139LS-012 Cushioned Fold-Down, Molded Fishing Seat, Grey/Charcoal: High impact plastic injection molded frame and firm high compression foam padding Embossed vinyl surface, 28 oz. marine grade UV treated and mildew resistant vinyl Mounts to any standard 5-1/4″ BIA 4 bolt pedestal system or swivel, fasteners included Seat Dimensions – Height: 15.75?, Width: 20.25″, Depth: 19.75″, Seat Depth: 15.5″