Rolled front bolster for a leaning surface, long lasting comfort and durability with high density, OEM Grade molded foam pack Form fitting seat cover in premium mixed texture, Heavy Duty Marine Grade vinyl is engineered to withstand the effects of sun, heat, rain and soiling and the harsh marine environment Mounts on any BIA standard pedestal, swivel or flat surface with a 5-1/4" hole pattern, and is seat slide compatible; Stainless steel fasteners included Perfect color and style match with Wise 3340 Quantum Series Fold Down Fishing Boat Seat SEAT DIMENSIONS - Height: 9", Width: 16.25", Depth: 13", Seating Depth: 9"