New bottom track

A quick learner from California says:
I was given the doors. I need the tracks, the rollers appear to be 23-028, so which track fits? The 23-270 to 273?
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Bob from SWISCO responded:

Hello. You are correct, this looks like the 23-028 which is a concave roller, so the 23-270 and its other-sized variants are the right track to use with it. Let me know if you have further questions. 

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