Milgard coil balance for a double hung

A quick learner from Honolulu, Hi says:
Markings on coil (405 S K), on bracket (98 31)
User submitted photo of their window hardware.
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Tom from SWISCO responded:
Thanks for posting. Please see our 26-336 pivot bar, 15-175 pivot shoe, and S152-5 coil spring and let me know if this hardware matches what you have.
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