Description: Height Adjustment: Boat Seat Base adopts a manual lift design, allowing you to easily adjust the seat height to enhance your comfort on the waterAluminum Alloy Material: Boat Seat Pedestal Slide is made of aluminum alloy, which is both lightweight and strong, and can be used for a long timeVersatile: Boat Seat Pedestal Mount can adapt to different heights and various boating scenarios, providing a high degree of flexibility and convenienceStable and Reliable Base: Boat Seat Mount Base is designed with stability in mind, ensuring that your seat remains stable during travel, improving safe by preventing unnecessary movementSize: Lifting Seat Pedestal has an adjustable height range of 33-48 cm, a board size of 33.2 x 18.5 cm, a support column diameter of 7.5 cm, and a base diameter of 22.7 cm, designed to seamlessly meet most boating needs Size Chart: Lifting height range 33cm-48cm/12.99inch-18.90inchSkateboard size 33.2cmx18.5cm/13.07inchx7.28inchSupport column diameter 7.5cm/2.95inchChassis diameter 22.7cm/8.94inch Package Includes: 1 Boat Seat Base Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.