I just purchased new echo universal trimmer head to try on one of my stihl's. looks like it will work well, comes with precut trimmer line [.155" ] just pop 4 pre cut line in each slot. The county bought a couple, and loved them so much, they converted all trimmers. it will take smaller line, but I'll try the bigger line. has anyone tried them. a little pricey, but maybe worth it.