Herman Miller Chair Mechanism Core Works Well Herman Miller – Was taken off An Aeron Size A. Has All Levers, Screws for the Up/Down, and Lean Back & Forward Levers. All in a bag. Has No Plastic Cover for entire mechanism. Works well, this was taken off Herman Miller Aeron. 2016 chair that had a problem Cylinder some of which is still attached. Part of the Cylinder is still attached.
