Bottom track for sliding mirror closet doors

A home owner from Narragansett, RI says:
We want to replace the bottom tracks on the sliding mirror doors at two closets. We need a 48 inch and a 72 inch piece. The doors were installed in 1990. It appears your product codes 23-242 and 23-240 are similar. I need to confirm that the bottom rollers are convex. I believe they are. There are no markings, names or numbers on the tracks.
User submitted a photo of mirror closet door track.
A home owner from Narragansett, RI says:
The rollers are convex.
Profile picture of Paul
Paul from SWISCO responded:
Thank you for posting. Yes, the 23-240 and 23-242 accept convex rollers. How do our dimensions match yours?
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