Coil balance. Wellington windows

A handy person from Milwaukee Wi says:
Top coil is a 6lb, bottom is a 7. Patent # is 5353548
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Emily from SWISCO responded:

Hi there!

Your hardware appears to be a match for our 15-087 pivot shoe, which uses the Series 180 coil springs, 15-086 housing and 16-024 bracket. Take a look at the specifications and see what you think.

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