Alpine counter balance 26 9 34# IL CALDWELL

Hello, thank you for posting,

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. 

The 26 9 stamp is older and does not directly translate to the available spring strength option. To move forward, you will need to obtain the weight of the window sash and compare the weight to the spring strength chart on the product page to choose the correct stamp option.

Please review and let me know if you have any additional questions. 

Comparison of the S378, S380 and S385 balance shoes.