Lower sash balance.

A quick learner from Georgia says:
April 20, 2019
Marked 28C. PA BSI
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Bob from SWISCO responded:
April 22, 2019

Thanks for writing in. See our S775-28 Tilt Window Channel Balance. You will need a stamp option of either 28C & 1" Shoe, or 28C & 1-1/4" Shoe. Measure the size of the bottom shoe to determine which is best. Let us know if you have any questions. 
28" Series 775 Balance
28" Series 775 Balance
S775-28
$21.91
How to install a S775 balance
How to install a S775 balance
GUIDE
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