Coil Balance Parts

A landlord from Charlottesville, VA says:
These are out of an MI3500 series window. Can you identify these parts?
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Lauren from SWISCO responded:

Hello, thank you for posting,

Your balance assembly resembles the 15-180 pivot shoe that is compatible with the Series 190 coil springs. You will want to review the stamp on the coil to choose the correct weight option. Please review and let me know if you have any additional questions! 

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