Channel Balance

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 length of the metal channel excluding the nylon attachments should measure 30" long, please compare.

The 29 9 stamp does not directly translate to our stamp option that indicates the spring strength to support the window sash. You will need to obtain the weight of the window sash and compare to the strength chart on the product page to determine 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.