Need to fix all the windows in my townhouse, none open

A quick learner from Jacksonville, FL says:
I am in need of 6 channel balances and might as well order 2 extra since at least one on each window has gone out. The metal shaft is 29" and there is a 28c stamped into it.
User submitted photos of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
Please start with our S380-29 channel balance. I think this could replace your older part. I would also recommend the 2830 option.
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