Balancer aluminum storm window

A handy person from Fort worth tx 76112 says:
January 19, 2023
Look like s372 to me.
29 inches in length
Spring load numbers don't match your numbers. My stencil number is 181
I need 2
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Tom from SWISCO responded:
January 24, 2023

Hello! I agree, our S372-29 looks like a great mach. I've never seen this size with an "181" stamp before, but you can weigh your sash on a scale to verify the best weight option using the chart on the S372-29 store page.
29" Series 372 Channel Balance
29" Series 372 Channel Balance
S372-29
$12.17
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