Lineage Big & Tall All-Mesh Task Chair, Supports 400lb, 19.5" - 23.25" High Black Seat,Chrome Base,Ships in 1-3 Business DaysHeight and tilt-lock mechanism is activated by a lever and cable system for easy adjustment; also features tilt tension knob to provide optimal comfort.Seat height is adjustable to suit a variety of users.Adjustable lumbar support allows the user to customize it to their individual comfort level. WARNING: This product can expose you to Lead, which is known to the State of California to cause Cancer and Birth Defect/Reproductive Harm. For more information go to www.P65Warnings.ca.gov. - Cancer:Lead;;Birth Defect/Reproductive Harm:Lead