Herman miller aeron remastered mesh desk chair size b (2 dots) medium size. Chair looks like new and has been touched up and looks and functions like new. Chair has the adjustable lumbar back support and arms that go up and down. Does not have the tilt forward or back knobs but has the tilt tensioner so you can adjust the bounce of the chair and the tilt amount. Also has wheels that work on all surfaces but are solid plastic and has vinyl arm pads. Let me know if you have any questions.