Window balance 28C USB

A quick learner from Venice FL says:
Hello

I need to order 10 of these window balances to repair 5 single
Hung windows. The metal channel is 29" exactly
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Bob from SWISCO responded:

Thanks for posting. This looks potentially like an S380-29 to me. This channel balance has a nylon shoe with a depth, or 'heel-to-toe' measurement, of 1". Double-check to see if your shoe's depth matches; let me know if it differs at all. For a stamp option, choose 2830.

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