2740 window balance

Hi there!

Could you show us your top nylon fitting? 

Thank you! 

I'm afraid those are your bottom fittings. We'll need to see the top fittings. Take a look at the video below, it will explain exactly what we'll need to see.

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. 

If you have any further questions just let us know. 

Comparison of the S378, S380 and S385 balance shoes.

The S380 and S385 come with both top and bottom nylon fittings along with the pulley hook at the bottom of the balance. 

Please see our 16-002 take out clip. Look over our dimensions and see if this is what you need.