Replacement Window Block and Tackle Sash Balance

Question

Hi. Looking for a replacement block and tackle sash balance part for my window. The part is stamped "26 4 FX CMC 11"
The length is 27". Could this be S385-27? Any clue what the FX stands for? Could the 11 represent the weight rating? Thanks.

Casey · Accepted Answer

Hello,

With this combination of attachments, you could have either the 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 2640 spring strength options for your replacement balances.

Thank you and let us know if you have any other questions or concerns.

Comparison of the S380 and S385 balance shoes.