broken coil on MI 8500

A quick learner from Lorton VA says:
Hi I need to identify the correct coil for my MI window single hung measures 33" x 64"
The coil only has the # 8 stamp.
Thank you
User submitted a photo of a coil balance.
Profile picture of Tom
Tom from SWISCO responded:
Please see our 15-180 shoe and Series 190 coil spring. I believe this hardware matches your own.
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