Scientific Anglers Amplitude Smooth Titan GT Fly Line Black/Surf/SandThe first series of lines to feature the revolutionary AST PLUS slickness additive, Amplitude will shoot farther and last longer than any other line on the market. Its slickness down to a science. Youve traveled half way around the world in pursuit of a fish that will test every single piece of your gear, you shouldnt have to worry about your fly line failing. With our 65lb. Tropical core design these lines are designed to perform when it counts.