Unique 28-C-30 Window Balance

A handy person from Orlando says:
August 22, 2021
I have a single hung single pane window and need 2 springs.
Number on the balence is
Unique 28-C-30.
Don't know the weight
But the size is 52 wide by 31 high for the one panel.
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Emily from SWISCO responded:
August 27, 2021

Hi there!

With this combination of attachments, you could have either an S380-29 or S385-29 channel balance. You’ll need to measure as shown below. The Series 380 has a 1" bottom attachment, and the Series 385 has a 1-3/32" attachment. You'll also want to select the 2830 stamp option when prompted. This is based on your older stamp rating of "28C."

Comparison of the S380 and S385 balance shoes.
Comparison of the S380 and S385 balance shoes.
29" Series 380 Channel Balance
29" Series 380 Channel Balance
S380-29
$11.10
29" Series 385 Channel Balance
29" Series 385 Channel Balance
S385-29
$11.10
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