Rage Powersports 4-Position Adjustable Boat Seat Pedestal Universal design works with most boat seats (4) Height positions at 11.75", 13.75", 15.75" and 17.75" with locking pin (2) 6.875" x 6.75" Mount plates with (4) 0.3125" x 0.8125" mounting holes Mounting hardware not included Heavy duty steel construction with a black paint finish