Trac-Lock 2-3 by 8 in. Powder Coat Aluminum Non-Locking Swivel 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 7 x 7 in. Non-Locking Trac-Lock Swivel High-Strength Aluminum With Powder Coat Finish Rotates 360 degree, Fits 2-3 by 8 in. Post Adds 3 by 4 in. To Height Of Pedestal 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 and easily Sturdy construction built to handle harsh marine conditions Specifications Size: 2.375 in. Finish: Powder Coat Material: Aluminium