There is no line designation in the catalog, but they do state Safari Pack Rods are superior fiberglass, carrying case in vinyl with padded lining. At 4 1/2 oz,the A&F Featherweight fly rods table has that weight rod for a # 6-7; but a 7' rod at 3 1/3 oz is rated for a #5. You might try a #4 or #5 & see how well the rod loads. One should be faster than the other in casting & not flex the rod to the ground with 30 feet in the air.