KingPin 23-1/4" -29- 1/2" H x 3/4" D Anodized Power-Rise Stand-Up Adjustable Post with Seat Mount by Springfield Marine. Springfield Marine knows that comfort is important in marine seating. Whether behind the wheel for long passages in rough water, dropping a line in a quiet creek, or anywhere in between, Springfield Marine offers a wide range of configurations and options. Features Adjustable height to be used as a seat or leaning post Built to provide secure, hassle-free boat seat mounting Will help bring your seat to its tip-top functionality Designed to help you get the job done quickly & easily Sturdy construction built to h & le harsh marine conditions Made to deliver trouble-free function & last for years to come Specifications Material: Aluminum Finish: Anodized Thread Type: Non-Threaded ABYC Code: B Size: 29.5" H x 23.25" Wx 0.75" D