Greetings, Glass Rod Lovers!

I have recently learned how to measure rod weight using the common cents system. My Cabela's CGR (classic glass rod) 4 wt. turns out to be (actually) a 2.08 wt rod!

I'm interested in knowing what the actual line number would be for an Echo glass rod (7 ft. 4 inch 4 wt.) I know that's a rather specific question, but perhaps you know or know someone who would know the answer. I have never tried this particular rod, so part of my question is curiosity since there is a video of a lady using one to micro skagit cast. I have found it interesting to try the micro skagit with various rods I have. Thanks in advance. Tom Hines