Sliding door replacement rollers

A quick learner from Los Angeles says:
I have some IWC slider doors and I need to replace the rusted rollers on the screen doors. I'm not sure what kind of replacements I need. Maybe just the wheels or maybe a larger mechanism. Hopefully the attached photo gives you enough direction as I don't want to break it trying to take it out.
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Bob from SWISCO responded:

It's tough to tell without seeing the roller out of the door, but you might need our 84-083. I can't be certain, but compare to your old roller to determine. 

A quick learner from Los Angeles says:
Bob thanks you so much for your reply. Video was helpful. So simple that feel stupid for asking. Anyway I'll be getting a handful of the 84-083 replacement wheels.

Thanks again!
How to replace a Columbia door bottom roller
How to replace a Columbia door bottom roller
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