Wise 8WD1062 Series Classic High Back Boat Seat Features No-Pinch Aluminum Hinges. Plastic Injection Molded Seat Frame. Marine Grade 28 oz. UV and Mildew Treated Vinyl. Marine Grade High Compresson Foam Padding. Comes with Mounting Hardware to Mount to any Standard BIA 4 Bolt Pedestal System. Seat Dimensions – Height: 23.25″, Width: 16.5″, Depth: 20″, Seat Depth: 14.25″. 6 Year Warranty on Frame, 3 Year Warranty on Upholstery.