Springfield marine heavy duty 2 7/8" boat seat pedestals.
All have 9" round bases with holes in 8" circle. Two are adjustable from 10-12" tall and one is fixed at 10" tall. All three have the Trac-Lock slide and swivel seat bases. I don't know if the 10" was ever used and the two 12" pedestals were taken off a new boat before it left the dealer.
Swivel and Trac-Lock slides all work smoothly.
$400 for all three or make an offer on what you want. Will consider trades for firearm, ammo, drill press, ??
Also have two more of the adjustable pedestals brand new in box.
Located in Bismarck but travel the state regularly.