Milgard channel balancer replacement part

A quick learner from Bellevue, WA says:
August 2, 2022
21" channel balance for Milguard non-tilt window. The string of one of the balancer broke. I would like to replace both of them.

I replaced one of the similar window channel balancers before.
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Emily from SWISCO responded:
August 8, 2022

Hello there!

We appreciate your patience during this busy summer. I recommend our S380-21 or S385-21 channel balance, depending on the depth of the bottom shoe. The Series 380 has a 1" deep shoe and the Series 385 has a 1-3/32" deep shoe. Measure as shown in the image below to determine the best match. You will also need the 2050 strength option, based on your 20 5 stamp. 

Comparison of the S380 and S385 balance shoes.
Comparison of the S380 and S385 balance shoes.
21" Series 380 Channel Balance
21" Series 380 Channel Balance
S380-21
$9.38
21" Series 385 Channel Balance
21" Series 385 Channel Balance
S385-21
$9.38
How to Replace a Non-Tilt Channel Balance
How to Replace a Non-Tilt Channel Balance
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How to replace a non-tilt channel balance
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Choosing a Non-tilt Channel Balance: What Will We Need?
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