2220 23" x 1/2"

A home owner from Florida says:
October 6, 2020

I am not sure what series this is. The spring seems to attach lower than your pictures. It is in a single hung no tilt window. Any help would be appreciated.

Thank you

Bill

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Bob from SWISCO responded:
October 9, 2020

Hey Bill. This looks like either an S351-23 or S390-23, depending on the depth of the bottom nylon shoe. Don't worry about the exact configuration of the spring; depending on who made your balance, it may look a little different from ours. So long as you select our stamp option of 2220, it will have the right strength for your window. 
23" Series 351 Channel Balance
23" Series 351 Channel Balance
S351-23
$9.91
23" Series 390 Channel Balance
23" Series 390 Channel Balance
S390-23
$9.59
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