What is the corrrect part number I need ?

Question

Hi

I think I need an S380-27 but I just need to confirm before I place my order.
I do not know the window manufacturer. This is stamped 26C USB

Please help ! Thanks
Larry, Valencia California

Emily · Accepted Answer

Hey, Larry.

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. The 26C stamp usually corresponds to our 2630 stamp option but you can always weigh your sash on a scale and refer to the chart on the S380 and S385's store pages.

Comparison of the S378, S380 and S385 balance shoes.