Herman Miller Classic Aeron PostureFit Support Kit
The Classic Aeron PostureFit Support Kit can be installed on your classic Aeron Chairs or Stools to provide support for the base of your spine. This type of back support prevents fatigue by helping the spine maintain a healthy S-shaped curve. Please note this item does not fit new Remastered Aeron Chairs and Stools. One dot is the A (small) size, two dots in a row is the B (medium) size, and three dots in a triangle is the C (large) size.