Channel balance

Quick Learner from San Francisco
For non tilt window . Smooth edges I think marking says BSI 24 B and metal part is 25inch in leggy and 1/2 wide advice what's comprable
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Emily
Emily from SWISCO
SWISCO
Expert

Hello!

I can only see the bottom fitting in the pictures above. Could you show us your top nylon fitting as well? 

Thank you! 

Quick Learner from San Francisco
Sorry your system only let me upload 5 pictures,
Here's the rest
5 user uploaded images
Emily
Emily from SWISCO
SWISCO
Expert

Thanks for the additional pictures!

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'll also need to remove your window sash and weigh it to choose the appropriate spring strength option. There's a chart on the S380 and S385's product page that shows you which option you'll need based on the weight of your sash.

Comparison of the S378, S380 and S385 balance shoes.
Comparison of the S378, S380 and S385 balance shoes.
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