Regency Kiera Swivel Chair with Ratchet-Back Height Adjustment Breathable and adjustable mesh back provides lumbar support Comfortable black seat TAA Compliant for government buildings Chair functions: 360 degree swivel, pneumatic seat height, back height, 2:1 Synchro Tilt, tilt tension, tilt lock, arm height and width adjustments Seat Height: 18-inches to 23-inches from floor, Seat Dimensions: 20-inches wide x 19-inches deep