High-performance task series combines ergonomics with high-tech styling Dual-action synchro-tilt control adjusts back recline at a 2:1 ratio to seat Adjustable integral lumbar support and 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 Alternative casters are available to meet your specific needs Chair Type: Rolling Chair; Folding/Stacking: N\A; Width: N\A; Depth: N\A