This is the part I'm looking for that is approximately 2" in length. Comes with 2 roller wheels, one of which is missing. These windows were installed when the house was built in 2004. We see the word Atrum on our window locks and stickers that are on window frames.
Bob from SWISCO responded:
January 24, 2019
Thanks for posting. See our 87-164. I think it's a promising place to start, just be sure to carefully compare the dimensions with your old roller to see if it's a match. Let us know what you find.