The Stratus is perfect for conference tables, open offices, reception desks, anywhere both comfort and style need to shine. Classic black vinyl upholstery with bunched seam stitching matches any décor. Plush cushioning and curved armrests add to the comfort of the Stratus. Chair functions include pneumatic seat height and tilt adjustments. Explanation of functions- 360 degree swivel: Chair is able to rotate 360 degrees in either direction. Seat height: Chair’s seat can raise and lower allowing the user’s feet to remain flat on the floor. Center Tilt: Central pivot point allows the user to recline seat and back of chair at a fixed angle. Tilt tension: Allows user to adjust the amount of force that it takes to adjust the seat back angle. Tilt Lock: Locks the chair’s back angle and inhibits it from being repositioned. All Regency chairs are backed by a 5-year limited manufacturer’s warranty on chair bases and frames and a 2-year limited manufacturer’s warranty on chair mechanisms and upholstery.