Window Channel balance from 1987 home

A quick learner from Johns creek, GA says:
Marking on the window channel is 8 24:C
The length of the metal piece is 25 1/16 " (Not including the plastic parts on the top and bottom.
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Paul from SWISCO responded:

It appears you have a 3/8" by 25" balance. That said, you can go with our S800-25 with a 24C option. Take a look and let us know what you think.

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