Sliding glass door rollers

A quick learner from Eureka, ca says:
I have these 2 wheel rollers with bumps on the side that appear to help hold the rollers in place. I can find a matching size, but nothing with holders at my local hardware store.
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Bob from SWISCO responded:

Thanks for posting. How does our 81-174 compare? Take a look and see if you think you could use this as a replacement.

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