Window balances

A handy person from Hanover PA says:
do you have something like this?
pulley balancer for bottom half of a double hung window.
Thumbnail of the uploaded file named broken pulley mechanism
Thumbnail of the uploaded file named 28C Stamp Balance
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Emily from SWISCO responded:

Hello!

Our S770-28 with the 28C option looks like a good match. Take a look at the specifications and see if you agree. Please note that the Series 770 installs at the top of the window track with a screw. If your balance uses something else to install, please let me know!

How to replace a tilt-window channel balance.
How to replace a tilt-window channel balance.
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