This is a fully functioning, iconic Herman Miller Aeron desk chair. It’s a size C which is for people with either wider hops and bottoms (like me), or those who like roomier chairs. I bought it during the pandemic because I was working from home. Now I’m back at the office and want to redo the room was my home Covid office. The chair is black and has lumbar support. It has some signs of wear, but it’s in great condition.