It's a 300X (3003 I think) grade Al tube with ~1/8" side walls. I can lift the whole 30' stick with one arm so not worried about weight. My J measurement is 16', I'll keep it in mind but the pole Jim has has me reconsidering making it telescoping. If it needs to be over 20' then I'll have to make it collapsible.Is it the right type of tubing? Otherwise it might be too heavy. The optimal length will depend on the size of the sail, the "J" dimension of your rig is the max length allowed if racing.