Feature:1. Free Swiveling: Equipped with a locking knob that can rotate 360 degrees, the pedestal allows you to rotate the seat 360 degrees, which can enhance your mobility and facilitate access to different areas on the ship.2. Adjustable Height: The adjustable range is 330480mm, which allows you to quickly and easily adjust the seat height through a control lever, thereby improving your visibility and comfort on water.3. Premium Material: Sturdy and durable anodized aluminum oxide, with a smooth, thick wall, and polished surface. It has a durable and corrosion resistant surface that can last for a long time.4. Great Comfort: Provide a sturdy base for your seat, which can support your weight and withstand the impact of waves, thereby protecting your knees and back from injury.5. Excellent Stability: After adjusting the base of the boat seat to a suitable height, turning the black large locking knob on the adjustment lever to the right can prevent the seat from shaking at any height.Specification:Item Type: Seat PedestalProduct Material: Aluminum AlloyProduct Specifications: Base, Seat RailProduct Use: For Ship, Seat, BaseAdjusting Height: Approx. 330 ~ 480mm / 12.99 ~ 18.9in.Package List:1 x Base1 x Slide Rail