Bass Pro Shops Boat Seat Deck Base features stainless steel construction with a mirror finish and is welded with reinforcing washers for maximum strength and durability. Nylon bushings ensure long life and provide the best bearing surface available. Base comes standard with 6 countersunk mounting holes. 8L x 4W. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Pedestal Seat Base.