Channel balances

A handy person from Naples, Florida says:
November 5, 2017
I need to replace the channel balances on a window, not tilt out. I have done this before. Size stamped on balance is 2950. I have included pictures of them. I believe these are Pan Am ends.

Before I order them, I just wanted to make sure that I am ordering the correct part. Is the product code S377-30 correct?
User submitted photos of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
November 9, 2017
Our S377-30 does look like a close match, yes. You just need to make sure the nylon ends are the same size.
30" Series 377 Channel Balance
30" Series 377 Channel Balance
S377-30
$11.52
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