Features the exceptionally comfortable Commodore rotational molded chair with Posi-Lock Chair Slide and locking, 360 deg. Quad-Action seat swivel, which provides right-or left-hand lock access and flat or 3 deg. seat mount. Also includes corrosion resistant, adjustable aluminum pedestal which adjusts from 15'' to 23''. Specifications: Base: 9''; 8'' hole pattern. Post: 2-7/8'' dia. Seat dimensions: 20''W x 19''D x 19''H. W/o cushion.