Check the listing for details. Herman Miller Aeron Tilt Tension control Shaft & Knob; Genuine Aeron Part. Condition: Used. Listed at 15.00 USD. Used Herman Miller tension control shaft knob---Thank you for visiting our page! If you didnt find what you are looking for please check the rest of our eBay storefront or feel free to message us directly for assistance. If you need help with placing an order, help with a current or past order please message us as well and we will be happy to help. IF you are expericing an issue with your order, please contact us before starting return so we can resolve the issue. For certain large items, freight shipping can be arranged. Please contact for details About Us-We are based in Chantilly, Virginia and sell top quality brand pre-owned office chairs and new/used OEM parts. We have thousands of parts stocked.Whether you have a Herman Miller Aeron, Humanscale Freedom, Steelcase Leap, Nightingale CXO, Haworth Zody, Knoll Life or other top brand office chair, we will do our best to supply you with the parts you need. Thank you and have a great day! -OFFICE CHAIR SOLUTIONS in CHANTILLY, VIRGINIA