Garelick 12" Fixed Height Seat PedestalFeatures: Compatible with Garelick hardware; Provides solid base of support for a variety of seat hardware; Accepts Garelick fore and aft seat slides and 360 swivel spider combinations; 2 7/8" (7cm) diameter smooth stanchion tube, 9.25" (23cm) diameter 6 hole base plate; H: 12" (30cm); Specifications: Accepts Seat Slides: 22000, 75080, 75081, 75082, 75083; Accepts Swivels: 99023, 99036; Instructions