Steelcase Think Task Chair, black seat with black mesh back.

Height adjustable arms.

Tilt Limiter

"Steelcase Think Chair in Black. "The Think chair is an ergonomic office chair that senses what your body needs. The Integrated LiveBack™ System conforms to your body and moves with you as you change postures. It features an advanced weight-activated seat, so anybody can get comfortable, quickly.                        

People want uncomplicated adjustments.  The Think chair’s weight-activated mechanism recognizes your weight and adjusts itself accordingly.  The comfort dial allows you to select one of four positions to adjust the amount of back tension and recline.  Height, width, pivot and depth adjustable armrests provide personalized support for your arms."