coil spring balance

A quick learner from Marietta, GA says:
no markings found on part. dimensions added to front pic photo
User submitted photos of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
Thanks for posting. Based on these pictures, I would recommend our 15-180 pivot shoe and Series 190 coil spring. There should be a stamp printed on the coil spring itself, which you can use to determine the proper Series 190 option.
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