21" channel balance 2020

A quick learner from Carlsbad CA says:
I need a recommendation so that I can replace a window channel balance.

Length: 21 "
Stamped numbers: 2020 DB L02
User submitted photos of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
Sure thing! Please see our S390-21. I think this is a match for your existing balance.
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