OEM Herman miller Aeron chair Arm Yoke left side only (when sitting in the chair- Genuine Aeron Parts. You will get one right yoke as pictured with the flip lever lock. The arm pad and arm pad support are not included only what you see in the pic. Only Fits Classic aeron and not remastered chair. Shipped with fedex ground or home. Have many available so please let us know if you need bulk.