SWISCO - The Replacement Hardware Authority

Polybau vinyl window - balance hardware

A contractor says:
Have a single hung vinyl Polybau window with a spring support system? The extension spring is about 7/16" O.D x 20" long attached to jamb at top and to pivot lock shoe. Is there a different balance that will work for this window?
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Tom from SWISCO responded:
I'm not sure what you have. Could you show us a few pictures of the balance in question? That will help us find a good match.
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