Replacement Channel Balance for Milgard Window

A home owner from San Diego, CA says:
April 22, 2017
Balance Size: 21" L (without plastic shoe & top) x 5/8" W (22" L with shoe & top)
Balance Marking: 20 4 JU CMC 7
Window Size: 23" H x 15-1/2" W

Please provide the Swisco part number for the channel balance described here.
Channel balance
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Tom from SWISCO responded:
April 25, 2017
Thank you for your inquiry. We recommend you taking a look at our S385-21 channel balance with a 2040 option. Get back to us and let us know if this is a good match for you.
A quick learner from San Diego, CA says:
April 25, 2017
Yes, that seems to be a good match for my window. I'll order the recommended part. Thanks for your help!
21" Series 385 Channel Balance
21" Series 385 Channel Balance
S385-21
$9.38
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