Wise Fixed Boat Seat Pedestal. Get your ship in working order with these Boat Seat Pedestals from Wise, all featuring polished anodized aluminum construction, 9" diameter base, 2 7/8" diameter pipe and locking 2 7/8" seat mount with 360 degrees swivel. 12" or 15" Fixed Pedestal with fore and aft slider grooved, thick-walled construction 12"-18" Adjustable Pedestal with spider seat mount or fore and aft slider smooth, thick-walled construction. Order ONLINE Today!