Superbly built shock-wave dampening pedestals crafted by EagleCraft custom boats (Campbell River). Made with quality aluminum, and has both swivel and aft/forward slide. Solid with no wobble, rattle, or squeaks. Wave dampening is provided by coil, shock, and dampening discs - with a range of 4-5 inches. Grease is recommended at 100 hr intervals via the accessible grease nipple. For/aft slide is Garelick part #75081 (Full Size Low-Profile Seat Slide). Swivel is provided internally with two bearing rings. Mounting base is a standard 6 hole pattern at 8" on centre - 9" overall. Height is fixed at 21 1/4 inches. Excellent condition - $1200.00 for the pair.