Part No. Description Height (mm) Post Ø Mount PlateL x W (mm) (in) (mm) 293792 Economy Pedestal 175 2-7/8" 72.6 180 x 180 293793 Economy Pedestal 325 2-7/8" 72.6 180 x 180 Rugged all steel construction with black autophoretic® coating (E coated) making it suitable for all marine environments.Can be used with any standard boat seat.Standard mount pattern.