These are Herman Miller Classic Aeron chair that have been fully refurbished. These Classic Aeron Chairs have been completely disassembled to be deep cleaned & repainted. Mesh is inspected for minor rips & tears, then replace mesh, if needed. Will have new arm pads, casters, posture fit, head rest & pneumatic cylinders. Which are the most common parts that tend to wear out or not work. Mechanical parts will be greased and lubricated & are all thoroughly tested, and have been confirmed to be mechanically 100 % functional. Forward & backward tilt, posture-fit back support, fully adjustable arms, mesh has like new resistance. And adjustable headrest with removable coat hanger. Backrest will need to installed. Installation video on YouTube will be available, via shared link, upon request.