I was looking at the Patio Sliding Glass Door Roller, Crossly Product Code: 81-126 and I have a few questions. The one I have looks very similar to yours, but there are a few differences. Mine only has one rivet on the opposite side of the wheel versus 2 in the picture. Also, it shows the length as 2
Paul from SWISCO responded:
October 1, 2015
That extra rivet in the 81-126 is to add strength to the housing to prevent it from separating. As long as the dimensions match, though, I think you will be okay.