window balance

A quick learner from Mountain View, CA says:
it measure 26" but i don't see the difference between ur S380 and S385 series. or i can b completely wrong. pivcking the right part b nice.

thanks,
David
User submitted photos of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
There is a difference between the two balances, yes. It comes down to the size of the bottom shoe. We have detailed measurements and information for each balance that you can use as reference. You will need to carefully measure your shoe to confirm the better match.
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