Extended-Travel Channel Balance Quote

A quick learner says:
metal channel: 21 inches
stamp: 2040 (see Bottom Fitting)
windows origin: Don't know
I need 2 windows sash balances as for now.
Thumbnail of the uploaded file named Top Fitting.JPG
Thumbnail of the uploaded file named Bottom Fitting.JPG
Thumbnail of the uploaded file named Metal Hook.JPG
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Tom from SWISCO responded:

Thanks for your photos. Based on what I see here, you have either our S380-21 or S385-21, depending on the depth of the bottom shoe. That's the only difference between them. I recommend measuring your shoe and referring to our dimensions to confirm the best match.

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A quick learner says:
It is 1 3/32 inches.
Does that means I can order S385-21 for my replacement?

Thanks.
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Tom from SWISCO responded:

Yep, if the shoe is 1-3/32" then you want the Series 385.

S380-21 : 21
21" Series 380 Channel Balance
S380-21
$9.02
VIEW >
S385-21 : 21
21" Series 385 Channel Balance
S385-21
$9.02
VIEW >
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