Aesthetically designed for contemporary appeal. Mesh-covered curved back for added support. Five-star base with casters. Pneumatic seat height adjustment. 360° swivel. Tilt tension. Synchronized with infinite lock. Multiple tilt lock for support in different positions. Ratchet back height adjustment for customized lumbar support without any levers. Polypropylene T-bar adjustable arms. Seat: 19w x 18-1/2d. Back: 18-1/4w x 20h. Overall height 39" to 43". Meets or exceeds ANSI/BIFMA Standards. Manufacturer’s five-year limited warranty. Shpg. wt. 36 lbs. Assembly required. Casters supplied with the chairs are not suitable for all floor types. Alternative casters are available to meet your specific needs.