channel balance springs 2090 GM 29

A quick learner from Thousand oaks, CA says:
December 2, 2020
I am looking for No. 2090 window channel balance but from your chart I find 21" series 380 up to 2050. How to order the 2090 channel balance? Thanks,

Thomas
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Bob from SWISCO responded:
December 4, 2020

Hey Thomas. A balance code of 2090 is from an older ratings system we no longer use. To know what stamp code to select, obtain the exact weight of the window sash. You can then match that exact weight with one of the weight ranges listed alongside each stamp option under the product description of the S380-21 shop page.
21" Series 380 Channel Balance
21" Series 380 Channel Balance
S380-21
$9.38
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