I need springs for a number of windows

A handy person from Hampstead MD says:
I need a spring for the following window sizes. the markings on the window hardware bare the name "Certain Teed"

26 x 39 1/2
36 1/2 x 37
33 x 39 1/2

Thank you
User submitted a photo of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
I'll go through your balances one at a time. Based on your measurements, here are the coil springs I recommend:

1) 26" x 39-1/2": S170-407
2) 36-1/2" x 37": S170-408
3) 33" x 39-1/2": S170-408

Just to confirm, though, there is usually a number stamped on the spring itself, near the screw hole. You should check these numbers before you make your decision. As for the pivot shoe, it looks similar to our 15-192. Just make sure the dimensions match.
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