Patio door roller

A professional from Florida says:
Can you please help identify this part and either identify the part or a replacement that will substitute for it?
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Dave Sr. from SWISCO responded:

I don't believe we can supply this same roller. That said, we have a few products you may want to look over: namely, our 81-056 , 81-160 , 81-173 , and 81-175 . These rollers all have a screw tab at the end of the housing. See if your patio door has a screw that holds the frame at the bottom rail. Maybe this screw tab will line up with your bottom rail frame screw. If it does, see which roller housing will fit into the bottom rail on the patio door. We have detailed dimensions in each case that you can refer to.

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