Alenco tilt in window spiral springs

A handy person from Jasper, ga says:
I need to replace the springs in two window
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Paul from SWISCO responded:
I'm not sure what you have without referencing the original balance. Many Alenco windows have been known to use our Series 390 channel balance, but there's no guarantee this is what you have. Carefully look it over and see what you think.
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