Help identifying parts

A quick learner from Folsom California says:
March 14, 2024
Hello.

I am trying to order parts for a window. I am looking for channel balances and have included some pictures of the side that still works. Can you tell me what part I need to order?

Here is what I can see
Window brand is Western Products
The metal portion is 22"
There is a stamp on the side that says: 21 B. BSI
The white plastic piece on the better one seems to be broken too

Pictures are below. Let me know if you need anything else from me.

Cheers

Dave
Thumbnail of the uploaded file named 21B Balance Stamp
Thumbnail of the uploaded file named Balance Top Guide
Thumbnail of the uploaded file named Channel Balance Shoe
Thumbnail of the uploaded file named Winged Balance Shoe
Thumbnail of the uploaded file named Channel Balance Shoe
Profile picture of Jasmine
Jasmine from SWISCO responded:
March 15, 2024

Hey there,

Thanks for posting! Your balances look like they could be either the S380-22 with a 1" shoe or the S385-22 with a 1-3/32" shoe. For your 21B stamp, I suggest using the 2120 stamp option which can support a sash weighing 8 to 12lbs.

To determine which series is needed for your window, look over the dimensions from the diagram below to confirm the depth of your bottom shoe. You'll also want to double check that your balance channel has a 9/16" width (which is considered 1/2" in the trade).

Comparison of the S380 and S385 balance shoes.
Comparison of the S380 and S385 balance shoes.
22" Series 380 Channel Balance
22" Series 380 Channel Balance
S380-22
$9.59
22" Series 385 Channel Balance
22" Series 385 Channel Balance
S385-22
$9.59
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