window parts

Hello,

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

You can start by comparing your top sash guide to the 18-176 and 18-188. If you notice any dimensions that differ, please write out your exact measurements and we can go from there. Unfortunately, we do not carry a replacement for the vent latch also shown in your photos. 

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

Comparison of the S380 and S385 balance shoes.