Napco Window - Broken Counter Balance

A home owner from Lowell MA says:
Can you please help me identify the parts I need to for my NAPCO Vinyl replacement window?

The lower window itself is 28.25" wide and 19" High. I have included pictures of the parts next to a measuring tape to help identify their dimensions.

Thank you for your help,
User submitted a photo of a coil window balance.
Profile picture of Paul
Paul from SWISCO responded:
Thanks for posting, MaryAnn. The springs look similar to our S152-6. See what you think. Besides replacing them, you may also be interested in getting new shoes. See our 15-177.
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