These go in between the silver bolt and hold on the arm indexing kit allowing the arms to pivot in and out.

We sell over 100 different used parts. If you want to figure out what is wrong with your chair, and how to fix it, buy our twenty minute diagnosis via email, text, video or call for $20.00, purchase at this link, https://rcannon8156.mystorefront.online/?l=1&product=10059&action=product

If you are in Florida we might be able to come to your location and repair your chair for you, if you are interested please ask us for a quote, so we can let you know how much it will cost.

Please let us know if you have any questions.

This is pre-owned, shows wear, but ready to be put to work on your chair.

This is for two star shaped washers that go through the arm support and screw into the arm yoke.? (Look a the circled number 53 in the last photo.) They are 21 mm wide, 9 mm is the ID of the round hole in the center, and it is 1 mm thick. They fit the size A, B and C chairs and are genuine OEM pieces for the Aeron office furniture line by Herman Miller. The bolt, white washer, and metal arm support are not included, we used them for demonstration purposes only.

If you want multiple parts we can combine shipping.