Window channel balance

Hi there!

With this combination of fittings, you could have either an S380-27 or S385-27 channel balance. You’ll need to measure as shown below. The Series 380 has a 1" bottom fitting, and the Series 385 has a 1-3/32" fitting. You'll also need a spring strength option of 2640.

If you have any further questions just let us know. 

Comparison of the S378, S380 and S385 balance shoes.