Tilt Window Channel Balances

A quick learner says:
March 19, 2024
channel length 28"
stamped "(11/2) unique 27-E-50"
building was built in early 2000s

I would be interested in purchasing a few dozen of these.
Thumbnail of the uploaded file named Pulley 2
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Casey from SWISCO responded:
March 20, 2024

Hello,

Your channel balance resembles the S770-28. The stamp code does not correspond to ours but you may be able to use the 28E strength options for your replacements. I would recommend weighing your sash to confirm that it falls within the 28-32 lbs range supported by the 28E balances. Take a look and let us know if you need anything else. Thank you! 

Close up view of the Series 770 balance top.
Close up view of the Series 770 balance top.

Close up view of the Series 770 balance bottom.
Close up view of the Series 770 balance bottom.
A quick learner from Orlando says:
March 27, 2024
Hi Casey! Thanks for that info - I weighed the sash and it was between 32 and 33 lbs. Any further recommendations?
A quick learner from Orlando says:
March 27, 2024
I found the weight list and went ahead and ordered two of the 28F! Thanks for your help!
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Casey from SWISCO responded:
March 28, 2024

Both 27E and 27F strength options will support a 32-pound sash, so you should be good to go. Just let us know if you need anything else. 
28" Series 770 Balance
28" Series 770 Balance
S770-28
$12.70
How to replace a tilt-window channel balance.
How to replace a tilt-window channel balance.
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