botton door roller broken on glass slider. Concave

A quick learner from Utah says:
What would you suggest to replace.
Thumbnail of the uploaded file named broken.jpg
Thumbnail of the uploaded file named door roller.jpg
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Bob from SWISCO responded:

Hello there. You say the roller has a concave wheel. But the second picture suggests that it's a convex wheel, or rather, it has a rounded edge to fit into a depressed groove. Side view pictures aren't always a gaurantor, so please look over to confirm. If it's in fact a convex roller, see our 23-199 or its ball-bearing counterpart, the 23-225

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