Spring balance

A quick learner from Tilt window says:
This is a spring balance for a tilt double sash window need to find a replacement for it
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Bob from SWISCO responded:

Thanks for writing in. This looks like it might be either a Series 160 or Series 165 Coil Spring. The difference between these two coil springs is their thickness, so compare both with your old coil springs to see what matches best. Let me know if you have any other questions.

How to replace a window coil balance
How to replace a window coil balance
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