Springfield Marine Taper Lock Manual Adjustable Pedestal w/ Seat Mount. The Manual Adjustable Post adjusts from 13" to 16". Use with any Taper-Lock Base which is sold separately. Features of Springfield Marine Taper Lock Manual Adjustable Pedestal With Seat Mount Two-Piece set includes a 2-3/8" Manual Adjustable Post (with Posi-Lock System) and Trac-Lock Non-Locking Swivel (#3100031-1) Use with any Taper-Lock Base sold separately Adjusts from 13" to 16" Built to withstand harsh marine environments Package Contents: Springfield Marine Taper Lock Manual Adjustable Pedestal With Seat Mount Springfield Marine 1603825: Taper Lock Manual Adjustable Pedestal w/ Seat Mount