Herman Miller Aeron Arm Supports Right Left chair Pair Polished Aluminum. These attach to the arm yoke and the arm pad screws onto them and the color is a graphite bronze. We sell over 100 different used parts. Please let us know if you have any questions. These are pre-owned, needs to be cleaned, shows wear, have discolorations that need to be polished or painted, but will work on your chair. This is for one pair with both right and left of the new style arm supports which are genuine OEM parts for the Aeron office furniture line by Herman Miller. 127 W Fairbanks ave, #254 Winter Park, FL 32789.