Window balance

A quick learner from Green Bay, WI says:
The balance spring is bad and I need to replace. I am not sure the manufacturer of the window or how to remove the bad balance without prying it out which I have not done yet.
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Casey from SWISCO responded:

Hello,

I can't be sure with the hardware still installed but based on what is visible, you could start by comparing the 15-087 pivot shoe, which uses the Series 180 coils springs, to your parts. Review our dimensions to confirm that they match up to your original hardware. We'll also relate a few videos to help you through the replacement process. Thank you. 

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