Coil balance no weight

A home owner from Upstate New York says:
April 29, 2021
Can't figure out the poundage for this coil. also not sure if its the right one for this window. I think it is Pella based on the window sash locks in the rest of the house that are Pella windows. Will this work?
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Emily from SWISCO responded:
April 29, 2021

Hello!

It looks like you have our 15-175 pivot shoe which is used with the Series 152 coil springs. Be sure to carefully review our dimensions and compare them to your current hardware to ensure they match up. 
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