HON 6212BW19T Resolution 6200 Series High-Back Swivel and Tilt Chair, Black/Iron Gray Dual-action synchro-tilt control adjusts back recline at a 2:1 ratio to seat Adjustable integral lumbar support Height and width-adjustable arms for custom comfort Five-star steel base with casters for easy mobility Casters supplied with this chair are not suitable for all floor types