Certainteed window part

A quick learner from USA says:
Hoping you can help me identify this part that I want to purchase for my window . The coil on one side broke ... I believe that's the only part I need since everything else seems to be OK. I took pictures of all the parts including the broken coil and the parts as the are when in the window and working on another window ... The window is double hung and probably weighs about 6 to 7 pounds or so
User submitted photos of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
Thanks for posting. I believe you could possibly use our Series 170 coil spring, but you will just need to match up the number printed on your spring to our available options.
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