Sliding mirror closet door top roller

A home owner from Toronto, Ontario,Canada says:
June 16, 2020
Hello.
This sliding mirror was installed by the builder of my home in 1988. I cannot remove the mirror door. Have tried to tilt the panel but no success.Also,what exactlydoes the bottom long philips screw do. do? I have not tried to unscrew. I am missing one of these. Also I have noticed other panels have one gold coloured and one silver coloured rollers.Does that mean one has to have a set of 2? Thanks for any help.
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Tom from SWISCO responded:
June 19, 2020

It's tough to make out what you have while it's still installed, but this looks similar to our 23-017. Look it over and let me know if you agree. 

If not, would it be possible to see a picture of it removed from the frame?
A home owner from Toronto, Ontario,Canada says:
June 20, 2020
I am no longer in need of a replacement part.The original piece was found inside the closet after it had fallen off during my attempt to remove the mirror panel.Thank you very much anyways.
Top Roller Pair, Acme
Top Roller Pair, Acme
23-017
$7.70
Sliding Closet Mirror Door Rollers & Tracks
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Sliding closet mirror door rollers and tracks
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