This is an excellent condition Herman Miller Aeron in the "A" size with black frame and black mesh. It has height, seat tilt and tilt/lock, and knee/tilt, plus adjustable arms. It does not have the lumbar pad or the posture-fit option, but these are easily obtainable online. It has no flaws in the mesh just a few small scratches in the frame and it looks great. We are selling it for $379.