Channel Balance

Quick Learner from San Francisco
Non tilt window , smooth edges I think marking says BSI 25 A and metal part is 26inch in length and 1/2 wide, please advice what's comprable
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Emily
Emily from SWISCO
SWISCO
Expert

Hello!

It looks like 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.

If you have any further questions just let us know. 

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