Window balance 2740

A quick learner from CA says:
April 21, 2020
Need help identifying this balance. Total length is 28 inches. Marked with 2740 followed by backwards k. Looks like 15-005 base shoe with 19-002 top?

Thanks for help!
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Casey from SWISCO responded:
April 23, 2020

Hello,

Take a look at our S350-28 with a 2740 spring strength option based on the stamp on your original balance. Please let us know if you have any other questions. Thank you!
28" Series 350 Channel Balance
28" Series 350 Channel Balance
S350-28
$10.97
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