Square dimensions of the channel

A home owner from Illinois says:
Other than length, what are the square dimensions of the S770-28. Thanks Al
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Paul from SWISCO responded:

The dimensions of the channel of the S770-28 channel balance other than length is 9/16" x 1/2". Take a look at the included picture.

The dimensions of the channel of the S770 window balance.
The dimensions of the channel of the S770 window balance.

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