I bought a "Samjax" due to Tom's proseltyzing a while back, FS synthetic. How do I know which generation of fiber that is? It's a nice brush. I wish I went a little smaller, but I didn't know my preferences at the time. Turns out they stop short of 26mm. Still a nice brush, even if I find I can't rip hard soaps with it so far. Great face latherer for creams though, for around $26.00 new.