Wise Ladder Back Helm Chair and Seat Slide, White Ladder Back Helm Chair with Arms, Cushion Set and Wise Seat Slide 8WD374 Includes Wise Seat Slide #8WD374 Fits 2-3/8" OD Diameter Pedestal Classified "AD" for Drivers Position with Easy Grip Lock Handles Seat Dimensions: 19" Height, 17" Width, 22" Depth, 15.5" Seat Depth 6 Year Warranty on Frame, 3 Year Warranty on Upholstery