Gen3 Marine Aluminum Adjustable Boat Seat Pedestal wMount This adjustable boat seat pedestal with mount by Gen3 Marine is a quality choice for any vessel. Constructed of aluminum with an anodized finish to hold up to harsh marine environments. Able to be adjusted from 12.5 up to 18.375. Comes with an aluminum mount that fits standard 4-hole mounting pattern. Features Aluminum Mount Adjustable from 12.5-18.375 Anodized Aluminum Specifications Tube Diameter 2.625 Base Diameter 9 Height Min 12.5 He