Window balance

A home owner from Johnstown, PA says:
June 3, 2023
Seven D window balance 21" marking 21B
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Bob from SWISCO responded:
June 3, 2023

Hello there. This looks like our S770-21 Tilt Window Channel Balance. For a stamp option, choose 21B. If your old pivot shoes that the balances attach to are undamaged you should be able to reuse them; otherwise, see if our 15-129 matches what you have. You'll need to make sure the width and thickness match your old shoe. Let me know if you have any further questions.

Detail of 15-129
Detail of 15-129
Pivot Shoe, 9/16" Thick
Pivot Shoe, 9/16" Thick
15-129
$2.50
21" Series 770 Balance
21" Series 770 Balance
S770-21
$12.27
How to replace a tilt-window channel balance.
How to replace a tilt-window channel balance.
VIDEO
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How to Remove a Pivot Shoe (Cutout Method)
How to Remove a Pivot Shoe (Cutout Method)
VIDEO
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How to remove window pivot shoes
How to remove window pivot shoes
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Anatomy of a tilt window
Anatomy of a tilt window
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