Window channel balances

A quick learner from Las Vegas says:
November 15, 2017
I need to replace 26 9 34 # CALDWELL NN window channel balances. I believe I need 27" series 385 balances but don't know which stamp option to choose and don't want to remove and weigh the windw due to installed interior shutters. I'm thinking you can tell which stamp option I need from the marking I gave you above. Am I correct?
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Casey from SWISCO responded:
November 15, 2017
The stamp might mean it's made for a 34 pound sash. I would check the sash weight to be sure by removing it and placing it on a scale.

If it is 34 pounds, select the 2665 stamp option, a pair will carry a window sash weight range of 33 to 36 lbs.
27" Series 385 Channel Balance
27" Series 385 Channel Balance
S385-27
$10.55
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