Wise 8WP21-374 Adjustable Pedestal with Slide 12-18-Inch Height Adjustment and 7-Inch Travel Seat Slide;360 rotation with locking knob 2 7/8-Inch Diameter Pedestal Post, 9-Inch Diameter Base Anodized Polished Aluminum Fits all brands of Seats meets Class AD ( Drive Grade) Standards 3 Year Warranty