sliding glass door dust covers?

A handy person from rosamond, ca says:
attached are some pictures of a part that came off my sliding glass door rails. I think they are dust covers.

please identify. distance between plastic bolts is 1 14/16"

thanks, Gordon
(sorry about blurry picture)
User submitted photos of sliding door hardware.
Profile picture of Tom
Tom from SWISCO responded:
Thanks for posting, Gordon! Don't worry, I think I can make out what you have. I think you should take a look at our 26-186 Weep Hole Cover and see if this matches up to what you have.
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