Channel balance

A home owner from Indiana says:
March 1, 2016
We are needing to replace the window channel balance in a window. I am attaching a picture of ours. I am not sure which one to use to replace this with. It is stamped with a 20.
User submitted photos of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
March 3, 2016
You don't show what fitting you have at the end of the balance, so I can't say with any certainty what can work to replace this. My educated guess is that you have a S751-21 ribbed balance that comes with the 15-014 knife lock shoe. However I cannot be sure. Look it over and see what you think.
21" Series 751 Channel Balance
21" Series 751 Channel Balance
S751-21
$10.56
How to install a ribbed tilt channel balance with knife lock shoe
How to install a ribbed tilt channel balance with knife lock shoe
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