I bought these ear cups for the Mr.Speakers Aeon Flow Closed headphones, because even though the supplied ear cups are of good quality, they are made of leather, which wears out very quickly for my taste. I was very surprised when I glued the earrings to the shells and found out that they DO NOT FIT and cannot even be glued properly and they come off! After careful examination, I found that there is a plastic "ring" inserted into the base of the earcup, which is larger and not quite the desired shape of the earcup. So I carefully removed the rings and glued the earrings without them. Now they fit well.