NOT A COMPLETE CHAIR. This is a Herman Miller Classic Aeron Size A, with no seat. Because the seat is missing and the cylinder is broken, a full functional test is NOT possible. Mechanism cover is slightly ajar, which means the tabs are basically broken. Mechanism cover is stained. Cosmetically rough, with a lot of scratches, scuffs, scrapes, rust, etc. No hip bolts, no seat link bolts, etc.