Genuine Herman Miller "Aeron" replacement back - includes Graphite frame and Carbon Black pellicle (mesh).
Available in 3 sizes. To find the size of your Aeron chair or stool, stand behind the chair and feel for the raised dots under the top edge of the back frame. One dot is the A (small) size, two dots in a row is the B (medium) size, and three dots in a triangle is the C (large) size.
