Milgard 21 inch channel balance replacement parts

A home owner from Morgan Hill, CA 95037 says:
July 29, 2019
Would like to identify and purchase proper replacement part for my Milgard Sash Window. It has a 21-inch channel balance (excluding the plastic tips. Photos are attached. This is the left side. Can you confirm the same channel balance will fit on both the left and right side? If it's the same part, I'd like to purchase a total of 4 channel balances to service two windows of this size.
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Casey from SWISCO responded:
August 1, 2019

Hello,

Take a look at the S380-21 balance with the 15-005 bottom shoe and the S385-21 balance with the 15-004 shoe. I'm not sure what size your bottom shoe is "heel to toe"? See which one of these balances match up to the one you are looking for. Take note you will also need to pick the option 2020 which is stamped on your balance. Thank you!


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
Winged Channel Balance Shoe, 1-3/32" Depth
Winged Channel Balance Shoe, 1-3/32" Depth
15-004
$0.74
Winged Channel Balance Shoe, 1" Depth
Winged Channel Balance Shoe, 1" Depth
15-005
$0.74
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