Gapco window balance

A quick learner from Cary, IL says:
May 31, 2021
I have 2 different size windows and I need new balances. oth are 28" one has markings by2740 and is a larger heavier sash the othe is marked C2730 and is a smaller sash.
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Casey from SWISCO responded:
June 3, 2021

Hello,

Take a look and compare the specifications of our S395-28 channel balance with 2730 and 2740 strength options for each respective window size. Thanks for posting! 
28" Series 395 Channel Balance
28" Series 395 Channel Balance
S395-28
$10.45
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