High-back task chair offers updated styling and features. Form-fitting contoured back and thickly cushioned seat and back provide superb comfort. Functions include synchro-tilt infinite lock mechanism with tilt tension knob, tilt lock, tilt tension, 360-degree swivel, and pneumatic seat-height adjustment from 17-1/2" to 22". 26" aluminum five-star base has chrome finish and two-tone dual wheel 2" carpet casters. Chair is upholstered in 100 percent acrylic fabric. Seat measures 20" wide x 18-1/2" deep. Back size is 20" wide x 20-1/2" high. Chair holds up to 250 lb. and meets or exceeds applicable ANSI/BIFMA standards. Optional stylish adjustable arms are sold separately.