Identify channel balance '30 3 Caldwell KL'

A home owner from Maryland says:
October 24, 2019
Hi,
I would like to replace the window balances '30 3 Caldwell KL', Non tilt window, 31' long, I'm not sure which one I should order, please help me to identify it. Thanks!
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Tom from SWISCO responded:
October 29, 2019

Hello! based on your photos, you have either our S380-31 or S385-31. The only difference between them is the depth of the shoe, so all you have to do is measure yours and refer to our dimensions to confirm.
31" Series 380 Channel Balance
31" Series 380 Channel Balance
S380-31
$11.30
31" Series 385 Channel Balance
31" Series 385 Channel Balance
S385-31
$11.30
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