Aesthetically designed for contemporary appeal. Mesh-covered curved back for added support. Five-star base with casters. Casters supplied with the chairs are not suitable for all floor types. Alternative casters are available to meet your specific needs. Meets or exceeds ANSI/BIFMA standards. Pneumatic seat height adjustment. Chair Type: Rolling Chair; Folding/Stacking: N\A; Width: N\A; Depth: N\A.