Ergomax Office MSH112BR Office Furniture, Medium, Brown Ultimate ergo chair with nylon frame, nylon armrests, nylon base with powder coated castors, iron gas lift, iron mechanism, and Korean mesh High back with adjustable headrest Supportive and adjustable back lumbar with synchro-tilt, any position locking mechanism Powder-coated height adjustable armrests One-year limited warranty Powder-coated height adjustable armrests Synchro-tilt,  any position locking mechanism