Aluminum single hung non tilt 20+ years old

A quick learner from Winter Springs, FL says:
I have several windows where the sash channel is not working. This one the channel is
31" long. and the number on the channel is 3030. Once we can identify this one we can replace all of them. Thanks
User submitted photos of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
This looks a lot like our S377-31 channel balance. Look it over and let me know if you agree.
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