Milgard Window Balance

A home owner from USA says:
I am trying to identify my Milgard window balance channel. It is 21 inches long without the plastic ends. The window weights 22.4 pounds. The channel is 1/2 inch wide and the markings on it are as follows.
20 5 FV CMC 7.
User submitted photos of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
Please take a look at our Series 385 balance. I think this looks like it could be a great match.
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