Window Balance

A home owner from Longmont, CO says:
February 28, 2022
Stamped marking on part is: 20 4 AP CALDWELL

Length of metal channel is 21"
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Emily from SWISCO responded:
March 1, 2022

Hello!

With this combination of fittings, you could have either an S380-21 or S385-21 channel balance. You’ll need to measure as shown below. The Series 380 has a 1" bottom fitting, and the Series 385 has a 1-3/32" fitting. You will also need the 2040 spring strength option. 

Let me know if you have any questions! 

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
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