Lorell High-Back Multi-Task Chair, 26-7/8 by 26 by 39-Inch to 42-1/2-Inch, Black The chair also features pronounced lumbar support with 2" back height adjustment Posture control allows pneumatic seat-height adjustment (18-9/10" to 22-2/5"), back-height adjustment, 360-degree swivel and asynchronous control Chair is available in black frame only The chair also features pronounced lumbar support with 2-inch back height adjustment Posture control allows pneumatic seat-height adjustment (18-9/10" to 22-2/5"), back-height adjustment, 360-degree swivel and asynchronous control Chair is available in black frame only