Used Steelcase Criterion task chairs with ergonomic controls.  This used mid-back Steelcase Criterion task chair the most comfortable chairs ever sold.  Criterion's ergonomic curves and pleasing contours provide all-day comfort. Seven independent adjustments offer support through a full range of seating positions. Ergonomic features include: variable back stop, adjustable back tension, seat angle adjustment, pneumatic seat height and adjustable back height.  The arms width and height are adjustable.  Criterion's solid construction provides support for the most demanding work environments - 7 million users worldwide agree.  Our used Steelcase Criterion office chair is rated 3 of 5 and is located in San Diego. The price does not include delivery.