28 inch window channel balance

A quick learner from Escondido, CA says:
Need to replace window channel balance. It is 28 inches long (not including plastic ends). Has the following printed on it : 27 4 EX CMC
User submitted photos of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
Hello! Please see our S385-28 channel balance with a 2740 option. I think this may be a good match, but look over our information to confirm.
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