Andersen Sash Balance

A handy person from Connecticut says:
July 20, 2020
Hi,

I need to replace 7 Andersen sash balances.
Old balance #s D5 7 27 12 70
Purchased one new balance #737, is this the correct balance to replace the old balances with?

Thx,

Scott
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Bob from SWISCO responded:
July 22, 2020

An old Andersen balance with a stamp code of 727 can indeed be replaced by our 24-737. The only issue I see here is that it appears your old balance lacks that side tab that our replacements possess. This is common with older versions of this hardware. You'll need to chisel out space in the window frame to accommodate the tab. The blog article here goes into detail. 
A handy person from Connecticut says:
July 23, 2020
Thank you Bob.
Andersen Sash Balance, 725, 727, 731, 737
Andersen Sash Balance, 725, 727, 731, 737
24-737
$54.20
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