NEW Replacement Herman Miller Aeron Medium B Lumbar Support Graphite. BRAND NEW OEM Replacement Herman Miller Aeron Task Chair Lumbar Support Graphite – Size B (Medium). Aeron Fit / Size Chart. Model – 241733-G1, B Size, Graphite Lumbar Support. Part #52 – Lumbar Pad Size A has 14 ridges Part #52 – Lumbar Pad Size B has 17 ridges Part #52 – Lumbar Pad Size C has 19 ridges. How can I determine my chair size if the label is gone? – To determine the size of your chair, feel underneath the top back lip of the chair’s backrest for a number of bumps. 1 bump is A, 2 bumps are B, and 3 bumps are C. One can also measure the seat pan width: Small A is 19 inches wide, Medium B is 20.25 inches wide and Large C is 21.5 inches wide. We accept most major credit cards in our showroom. The Original AERON® Chair. Herman Miller Mirra® Chair. Herman Miller Embody® Chair. Herman Miller Sayl Chair®. Herman Miller Setu Chair®. This item is in the category “Business & Industrial\Office\Office Furniture\Chairs & Stools”. The seller is “backstore” and is located in this country: US. This item can be shipped to United States.

• Brand: Herman Miller
• Model: Aeron Lumbar Support
• Color: Carbon / Graphite
• Material: Classic Carbon / Graphite
• Desk Type: office
• Room: Office
• MPN: 241733-G1, B Size, Graphite Lumbar Support