balancer stamped weight

Home Owner from Chicago
My balancers have 2010 A stamped in them I believe I need the S390 20inch but do not know what to put as the option. Please advise
2 Replies
Tom
Tom from SWISCO
SWISCO
Expert
The best way to confirm which option you choose would be to weigh your window sash on a scale. From there you would correspond that number to the sash weight range chart.

However, before you proceed, I would like for you to reconfirm the length of your balance. I am leaning more towards our S390-21 channel balance with a 2010 option as the replacement. If you are uncertain, you can always send us some photos
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