Here’s a link for what I bought on Amazon FR: Amazon.fr
As you can see, they are made for the Bose QuietConfort II but they fit perfectly on both Fairbuds (contrary to my last memory foam tips from my previous earbuds).
I suspect they prevent the first gen of Fairbuds from making a good contact in the box, as I have issue with the buds regularly connecting and staying on while in the box, but I’m not 100% sure it is related.
However, I have no issue so far with the gen 2, and I’ve been using them for weeks now.