Wise 3366-784 Offshore Series Deluxe Helm Chair is loaded with luxury features and design; Engineered as a strong and comfortable helm seat for Offshore boating, constructed with premium materials for roughest marine environment Oversized arm rests with built-in stainless steel cup holders, heavy duty, anodized aluminum arm & back support brackets; High-impact Marine Grade seat frame, with comfortable compression foam padding Heavy-duty 28 oz marine grade vinyl, double top stitch construction with attractive modern style embossed detail. Withstands the effects of sun, heat, rain and soiling under normal conditions Includes Wise 8WD399 universal mounting plate to fit BIA standard marine seat pedestals, seat swivels with 5 1/4" hole pattern, or 12" marine seat slider mount; Engineered for the harsh offshore marine environment Seat Dimensions: Seat Height: 20.5", Seat Width: 30", Seat Depth: 20.5" Sitting Depth: 16", Sitting Width: 16"