Milguard balancer non tilt window

Question

Can you identify this part? The metal portion end to end is 27"  The metal portion if I am measuring between the plastic clips is 26"  My guess is this is a 380 or 385, but can really tell.  The plastic wing pieces are just under 1" wide. Not sure what else you would need.

Emily · Accepted Answer

Hi there!

With this combination of attachments, 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 attachment, and the Series 385 has a 1-3/32" attachment. You'll also need a spring strength option of 2640.

Comparison of the S378, S380 and S385 balance shoes.