Certainteed Window parts

A home owner from USA says:
I have attached a picture of the part that we took from the window. There were no numbers on it only
User submitted a photo of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
This appears to match our Series 170 coil spring, which is often used on Certanteed windows. You will need the stamp on the spring itself to determine the best option. Check the other springs in the window. If there are still no stamps, give me the weight of your sash and the number of springs used on each side and we can calculate what you need.
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