The trabucco ones I'm using are fom 0.18 to 0.57 dia, which they state as 12lb to 70lb but I wouldn't bet my life on it! I'm taking about a metre off the thin end before I tie it so the line is more like my main line. The continental brands like trabucco,Grauvell, Yuki,and colmic seem to produce the nice limp tapered leaders that fly off the spool effortlessly when you cast. I've used the daiwa , Varivas,Sakuma and drennen tapered leaders and while they are very abrasion resistant they are also quite wiry and stay like a spring when off the spool. This is something I don't like. They are ok and do the job but seem very crude compared to the continental makes. Good luck with finding the best ones for you.