Paul from SWISCO responded:
October 12, 2016
We should be able to help, though I'm not totally sure what this is. You're only showing the inside portion of a complete roller unit; the outer housing is missing. I would assume it's still installed in the door. I think you could have our 81-004 or 81-278, but the only way to be sure is to remove the outer housing from the door and confirm.
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