Window will not stay up in any position

A home owner from Colorado says:
I took the window apart. I do not have a tip color on mine.

The balance is 25? long
diameter is 5/8?

And the spiral is 25 3/4 inches long.

What do I need to purchase to fix my window.
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Tom from SWISCO responded:

It sounds like you need a new balance. Since the diameter is 5/8" and the length is 25", you want our S600-25. You'll have to weigh your sash on a scale to confirm the best tip color.

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