This is an authentic back only replacement for the Herman Miller Aeron Chair, Size B in black. Exactly what you see in the picture. It is clean and there are no tears or snags to the mesh that I can see. Just minor scuff marks on the edge of the plastic frame. From a smoke free, pet free home. If you have a cat or pets that have damaged your chair, this is the perfect way to restore your Aeron to its beautiful condition. I’ve successfully replaced the backs on two other chairs, and it’s a pretty easy process thanks to the Aeron’s modular design.