replacement balances

A handy person from Floral Park NY says:
Anderson balances with the following numbers:

D31 7#27 10-81


I need 4 units,please advise if available and cost.
Phil G
Profile picture of Donna
Donna from SWISCO responded:
Hi Phil,
You will need the 24-737, Andersen Window Balance
A handy person from Watertown, NY says:
I have a sash balance with the following number on it. Can you tell me what the current replacement number would be? Thanks.

D9 7#31 3 80
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Tom from SWISCO responded:
I would recommend the 24-737 here, as well. Among the stamps that this balance can replace, 7#31 is one of them.
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