Sash Weight

A home owner from Florida says:
January 19, 2023
I have determined that I need the S351-30 channel balance but how do I determine the Sash Weight Range? The only stamping I see on the balance is 29-4 KX CMC 9.
A home owner from Florida says:
January 20, 2023
I put the sash on a scale and it measured 23 lbs. Should I get the 2930 (16-23lbs) or the 2940 (23-28lbs)?
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Tom from SWISCO responded:
January 23, 2023

Hello! If your sash is precisely 23 pounds then you could theoretically use either the 2930 or 2940, since they both carry that weight. However considering your old stamp is 29-4 then it's probably a safe bet to stick with that rating. I would go with the 2940, which is the same thing.
30" Series 351 Channel Balance
30" Series 351 Channel Balance
S351-30
$11.52
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