A home owner from Florida says:
December 10, 2015
Screen door roller ID
Dave from SWISCO responded:
December 11, 2015
Hey, thanks for posting. The wheel you show in your photo is used for a few different types of roller. To start out, look at our 84-010, 84-011, 84-026, 84-073, and 84-136. I've also made a list on the right hand side of this page. See if any of these rollers are the same as your sample. You'll need your old corner handy to make the best match. If not, send us a photo of the complete part. Please give us your dimensions, as well.