Deck Mounted Seat SlideSwivl-Eze has the boating experience to deliver all the kinds of accessories you want.Features:. Seating accessories for retrofitting and improving. Adapters to change a post installation or swivel location. Mounts directly to the boat deck. 1-5/8" total height. Constructed of strong aluminum. Convenient front control operation. For use on stamped and welded seat mounts or cast seat mounts not originally equipped with slider