Revesun Office/Computer Chair with arms with fabric pads -purple Pneumatic seat-height adjustment for easy positioning.One Touch Pneumatic Seat Height Adjustment. Heavy Duty Nylon Base with Dual Wheel Carpet Casters.For Residential Use Only. Brand New in Retail Packaging. Back can not betilted.Strong 5castor-wheel Chrome base lead 360 Degree Swivel. Height adjustment.Thick padding for superior comfort.Easy to follow instructions . Maximum Holding weight: 150KG. Ergonomically designed for comfort for those who work at desks for long periods.