Coil constant force balance for alliance window

A handy person from Highland, MI says:
Have a coil I am trying to identify weight it has either a 6 or a 9, from the screw hole on top it's a 9, if I were to hold it with the tab pointing up.
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Paul from SWISCO responded:

Hi, most Alliance windows use S152 coil springs, so you can go for the S152-9. Hope this helps.

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