Swivl-Eze Lakesport adjustable Seat Pedestal 14" - 20" 2 3/8 inch Super satin anodized post is swaged and welded to base for lasting durability Height adjusts 14- to 20-inches Includes seat mount and 9 inch diameter aluminum base Engineered to exceed American boat and yacht Council standards Type a rating, not for Use as a helm/driver seat