Description: 【Adjustable Manual Seat Base】: Designed for marine use, this Boat Seat Pedestal offers manual adjustability to ensure optimal comfort and positioning on your boat or yacht 【Aluminum Alloy Construction】: Crafted from aluminum alloy, this Boat Seat Pedestal Stand Base is both corrosions resistant and rust proof, making it ideal for long term performance in harsh marine environments 【Easy Sliding Functionality】: Enjoy the convenience of a sliding mechanism that allows for easy forward and backward movement up to 30cm, providing flexibility in seating arrangements 【360 Degree Rotation Capability】: The Boat Seat Pedestal features a full 360 degree rotation, allowing you to easily turn and face any direction without having to reposition the entire seat setup 【Adjustable Height】: With an adjustable height, this Boat Accessories is designed for accurate fitting on various boat models Specification:Adjustable height 33cm/12.99inch-46cm/18.11inch, base diameter 23cm/9.06inch, adjacent hole distance 10cm/3.94inch, hole diameter 7.8mm/0.31inch, top plate 33cmx17.78cm/12.99inchx7.00inch Package Includes: 1 Boat Seat Pedestal Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.