34" window lift rod

Hello,

With this combination of attachments, you could have either the 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. 

If there are no stamp codes on the original balances, you can follow the chart on the product page that explains how to choose your option based on the sash weight. Thank you and let us know if you have any other questions or concerns. 

Comparison of the S378, S380 and S385 balance shoes.