Looks like the part I need is 385-28.
What is the 2740 option? My current springs are stamped 2740.
28" long and 9/16" wide.
2740 balance spring
Home Owner from California
Jun 2, 2021 11:01 pm
3 user uploaded images
2 Replies
Emily from SWISCO
Jun 7, 2021 10:47 am
Hi there!
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 a spring strength option of 2740. The stamp on your channel represents the weight range your sash can hold.
If you have any further questions just let us know.
Comparison of the S378, S380 and S385 balance shoes.
