Spiral Balance question

A contractor from NYC says:
Need replacement spiral balances like this. Thank you, Artie
User submitted photos of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
The manufacturer who made these balances is out of business, but we can still help. Please tell me the length of the balance and we can custom make a replacement balance for you. In your case, the length would be from the end of the balance to the bottom of the red nylon bearing, where that coil ends.
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