Simtonon window balance replacement

A quick learner from Fullerton, CA says:
Hi, I need to replace the left side window balance assembly of a Simonton double hung window It is about six inches long. The photo shows the unbroken right side.

Patent number 5.232.208
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Paul from SWISCO responded:

We believe you're describing a 15-206 nylon coil spring cover which holds four 3/8" wide coil springs. The 3/8" springs in question will be our Series 165 and they come in different weight sizes. See our video on this series balance for more detail.

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