tilt window balance

A quick learner from New Brunswick Canada says:
Stamped with 02/10 Unique 20-C-30 and is 21" in length
User submitted a photo of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
Thanks for posting. I'm having trouble making out exactly what kind of balance you have. Can you confirm what kind of channel it has, either ribbed or plain? If you aren't sure what I mean, please show us a closer picture of it from an end-facing angle. That will allow me to confirm. I would also like you to tell me its width and thickness. Finally, there should be a shoe that it attaches to, perhaps still in the track. Could you show me a picture of yours?
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