I need help with certain closet door track

A contractor from Denver Colorado says:
Hi my name is Dave. I'm s contractor out of denver colorado. I'm looking for a certain type of closet sliding mirror door bottom tracking. I've attached a picture of it wight this email. Your help is appreciated greatly. Thank you
User submitted a photo of closet door track.
Profile picture of Tom
Tom from SWISCO responded:
Hello! It's hard to make out whether these rails accommodate a convex wheel or a concave wheel. It looks like it uses concave wheels. Can you confirm? If so, start by looking at our 23-258. This may be a good match.
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