Scientific Anglers Mastery Trout GP Fly Fishing Line - Utilizing the tapered belly from Infinity, Trout GP has a slightly longer front and rear taper and 1/4 size heavy weight scheme. Compared to Infinity, Trout GP leans more finesse but is still a capable general purpose trout line.The choice for anglers who don't consistently fish heavy rigs like large streamers or bulky indicators. Braided multifilament core; SA MS TROUT GP WF X F (X = line weight); Utilizing the tapered belly from Infinity, Trout GP has a slightly longer front and rear taper and 1/4 size heavy weight scheme. Compared to Infinity, Trout GP leans more finesse but is still a capable general purpose trout line.; The choice for anglers who don't consistently fish heavy rigs like large streamers or bulky indicators.; Braided multifilament core; SA MS TROUT GP WF X F (X = line weight);