Assitance with choosing the right window channel balance.

A quick learner from Port Charlotte, FL says:
April 5, 2023
Good afternoon,

I need to replace a window channel balance. The only stamped information. that I see on my current one says 22B USB.
Could you please explain what that means.
Is that enough information to guide you which product I need? Or do I have to measure or weigh anything?

Thank you for your time.

Paul
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Emily from SWISCO responded:
April 6, 2023

Hello there, Paul.

The stamp on your balance's metal channel doesn't help identify what Series you have, I'm afraid. It simply represents the weight range your balance is calibrated to support. In order for us to help, I will need you to remove an undamaged balance along with the end fittings intact and show us some photos. The video below will go into more detail as to what we're looking for. 
22" Series 390 Channel Balance
22" Series 390 Channel Balance
S390-22
$9.59
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