is the 80-110 length a true 72"

A handy person from Massachusetts says:
is this track for a single sliding door or two ? I'm looking to replace a track that handles one door, the sizes you have shown seem to be the sizes I need and is the length a true 72", I'm looking for 69 1/2"
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Mike from SWISCO responded:
This track is for a single door. The length is a true 72".
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