THESE ARE REFURBISHED HERMAN MILLER (AERON) ERGONOMIC CHAIRS WITH LUMBAR SUPPORT. AVAILABLE IN BLACK MESH ON GRAPHITE FRAME & BASE. FULLY ADJUSTABLE VINYL ARM PADS. FULLY ADJUSTABLE LUMBAR SUPPORT PAD. REAR AND FORWARD TILT LOCK LIMITERS. PARTS AND LABOR AT COST FOR AS LONG AS YOU OWN IT. IN HOUSE REPAIRS DONE ON ALL OUR CHAIRS. THE CONDITION OF THESE AERONS ARE LIKE NEW. WE LITERALLY REBUILD THESE BEFORE OFFERING THEM UP FOR SALE. DESIGNED BY DON CHADWICK AND BILL STUMPF IN 1992. EASILY WORK FROM HOME 10- 12 HOUR DAYS ON THIS CHAIR. Sleek and stylish, the Herman Miller Fully Adjustable Aeron has a lot to offer. Product Details: Size B (Medium) Adjustable Arms Tension Control Back Tilt Lock Front Tilt Lock Carbon Mesh – 3D01 Pneumatic Height Control Lumbar Pad support.