Need new window balance kits

A quick learner says:
January 8, 2021
The windows were installed new in 1998 ..I have no other info and cant find any other markings
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Casey from SWISCO responded:
January 11, 2021

Hello,

This style of balance is no longer available but our S775 channel balance makes a great replacement. You'll just need to weigh your window sash and determine the width of your original shoe to choose the correct specifications. There is a chart under the product description that will tell you which option to choose based on the sash weight. Thank you!
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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