SWISCO - The Replacement Hardware Authority

Balance length identification

A quick learner from USA says:
I found on the side of my window printed with the information below:

Sash: 35.437 x 29.125

Which length should I use ordering the spiral balances? Thanks for your help.
A quick learner from USA says:
I have Alcoa Window that tilts open with a blue cap.
looking to replace 6 spiral balances. They length I measure is 27. I the side of the window has listed sash: 34.437 x 29.125
User submitted a photo of window hardware.
Profile picture of Paul
Paul from SWISCO responded:
Is this a tilt window or non-tilt? Also, when measuring the balance, are you only measuring the outer tube itself? Finally, what is the diameter of that same tube?
A home owner from IL says:
The Window does Tilt. I am only measuring the tube it self. The sticker on the window thru me off with the sizes listed. I have posted some pictures. Thanks for your help
User submitted a photo of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
That picture is a huge help, thank you. See our S600-27 spiral balance, I believe this is what you're looking for.
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