Wise 8WD015-7-710 Standard Pilot Chair with Cushions, 12-18" Adjustable Height Pedestal and Seat Mount, White Roto Molded Chair, Snap-On Cushion Set, 12"-18" Adjustable Pedestal, Seat Mounting Plate and Seat Spider Mount Includes Wise Mounting Plate #8WD399-1, Wise 2-7/8" Adjustable Pedestal #8WP21-18S and Seat Spider #8WD94 Classified "AD" for Drivers Position with Easy Grip Lock Handles Seat Dimensions 18.25" Height, 17.75" Width, 22.5" Depth, 17" Seat Depth 5 Year Warranty on Frame, 3 Year Warranty on Upholstery