Window Coil Balance Replacement part

A home owner from Manassas, VA says:

I need few Window Coil Balance Replace parts (Dual Coil) and don't know the weight of the window. this is a standard window (I believe 30"x36")
Image is attached here.
Just wondering if you could help me pick the right part.

User submitted photos of a coil window balance.
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Paul from SWISCO responded:
Thanks for posting! It looks like you have a broken pivot shoe. Our 15-180 appears to be similar, but compare it to yours to ensure they match.

That very well may be all you need, but if you also need to replace the other parts then see our 15-181 support, 15-182 bushings, and Series 190 coil springs.
A home owner from Manassas, Va says:
Hi Paul,

Thanks for your quick response.
How about if I want to buy the entire thing. Would Series 140 Dual Coil work?

If yes, which one would be the most fit as far as weight?

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Paul from SWISCO responded:
I wouldn't recommend trying to change out your system for something else. I believe your window was made with this specific balance system in mind and you should stay with it.
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