The 3/4" system gives you outstanding economical performance. The design is proven by decades of experience. Posts are available as fixed, manually adjustable, or power-adjustable. Not recommended to interchange with other manufacturers' products.
7x7 inches, Non-threaded, acetal bushing, clear coat
3.5 inches required diameter mounting hole
2.5 inches depth below deck
Seat mounts, posts and bases available in steel, aluminum, or stainless steel
7" by 7" aluminum base