Window channel balance

Question

I have a lot of windows that I would like to replace the window channel balance. I want to do a few windows before I order all of the parts. Also, my neighbors are looking for these same part.
Thanks

I have 2 type of windows

Short window (see attached photos)
Marking - 27 4 BSI OF
metal part is length 28, height 5/8, width 1/2

Long window
Marking - 33 3 BSI OD
metal part is length 34, height 5/8, width 1/2

Top 19-005?
Bottom 15-004?

Lauren · Accepted Answer

Hello, thank you for posting,

With this combination of attachments, you could have either an S380 or S385 channel balance. You’ll need to measure as shown below. The Series 380 has a 1" bottom attachment, and the Series 385 has a 1-3/32" attachment.

You will need a 28" balance with a 2740 stamp option and a 34" balance with a 3330 stamp option. Please review and let me know if you have any additional questions.

Comparison of the S378, S380 and S385 balance shoes.