non-tilt double hang window spiral balance

A quick learner from Allen says:
Hello,
I am looking to replace a couple of spiral balance for a couple of windows in my home. It is a non- tilt double hang window, it is 30"long and 3/8" in diameter. However the spital we had take down has no color indicator in the front, and the window is non-tilt window, do you think you can help me with that? Thank you very much.
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Bob from SWISCO responded:

Take a look at our S400-30 Non-Tilt Spiral Balance. See if this matches up. To know what Color Tip to select, obtain the exact weight of the window sash, then match that with either weight range listed alongside the Color Tip options under the product description. 

How to Identify a Replacement Spiral Balance
How to Identify a Replacement Spiral Balance
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How to adjust a spiral balance on a non-tilt window
How to adjust a spiral balance on a non-tilt window
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How to choose the proper spiral balance tip color
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