They are all in excellent condition, with no cracks or tears. Lumbar Pad Size A has 14 ridges – 19 inches wide – SMALL. Lumbar Pad Size B has 17 ridges – 20.25 inches wide – MEDIUM. Lumbar Pad Size C has 19 ridges – 21.5 inches wide – LARGE. The Aeron lumbar support pad adjusts vertically to provide back support over a 4-inch range, supporting the natural curve of your midback, or lumbar region. Lumbar Depth can be set at 3/4″ or 1 1/4″ by sliding it up and off to flip it over. Lumbar Support Pad can also be adjusted up and down vertically 4 1/2. The Aeron lumbar support pad increases the comfort of the chair for those who like to recline as they sit. The lumbar support pad can be positioned with a thinner or thicker side facing you to vary the level of support provided. To find the size of an Aeron Chair, stand behind the chair and feel for the raised dots under the top back lip of the chair’s backrest frame. One dot is Small size, two dots in a row is Medium size, three dots in a triangle is Large size. We’re sorry, but we cannot make any exceptions. Please verify your address during checkout We are not responsible for any wrong or undeliverable addresses. Sorry, no PO Boxes. The item “Lot of 50 Herman Miller Aeron Chair Lumbar Support Pad Size B Medium OEM USED” is in sale since Wednesday, November 14, 2018. This item is in the category “Business & Industrial\Office\Office Furniture\Chairs & Stools”. The seller is “frozenfiresales” and is located in Easton, Pennsylvania. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Chile, Colombia, Costa rica, Panama, Trinidad and tobago, Guatemala, Honduras, Jamaica, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion.