Replacement Window Balance non-tilting

A quick learner from Marion, Oregon says:
July 22, 2019
I need 4 each for 2 windows. The glass in each sash was replaced with noise attenuating glass and now each sash weighs approximately 25 lbs. The existing balance springs cannot keep window open.
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Paul from SWISCO responded:
July 29, 2019

Based on your photos, I believe you have our S385-26 with a 2550 option. Please look it over and tell me if you agree.
26" Series 385 Channel Balance
26" Series 385 Channel Balance
S385-26
$10.55
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