please help identify which channel I need.

Question

My rail is 27 inches in length. It has these markings: "26 4 FX CMC 11".

Bob · Accepted Answer

This seems to be either an S380-27 or S385-27. The only difference between these two balances is the depth of the bottom nylon shoe, or the 'heel-to-toe' measurement, so compare both with your old hardware to see what matches best. For a new stamp option choose 2640.

Comparison of the S380 and S385 balance shoes.