Serenity Big/tall High Back Leather Chair, Supports Up To 500 Lb, 19.5" To 22.5" Seat Height, BlackOversized five-star base with casters for stability and mobility.Features swivel seat with pneumatic height adjustment, tilt lock and tilt tension that may help support correct posture and help ease pressure points. 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