The High Back, Height/Tilt Adjustable, Modern Executive Chair with Padded Arms and Chrome Base by Calico Designs combines a sleek white glossy frame with a modern, durable PU (vegan leather) covered seat, arms and back. The 360-degree swivel seat (19.5" W x 19.5" D) adjusts in height from 18” to 21”. Use the height-adjustable lever to also adjust the tilt of the back angle. The tension control knob adjusts the ease or resistance of the tilt angle. The stylish, 5-star chrome base has casters that allow you to move the chair easily.