Not Sure Which Replacement Channel Balance I Need

A home owner from Broken Arrow, OK says:
Can you tell which channel balance I need to buy. It is 1/2 inch wide and the aluminum is 29 plus inches long. Please refer to the attached photos.
User submitted photos of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
Hello! Please see our S390-29 channel balance. I think this may be what you need.
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