Scientific Anglers Amplitude Double Taper Fly LineFor Delicate Deliveries To Trout Scientific Anglers Amplitude Double Taper Fly Line, The first series of lines to feature the revolutionary AST PLUS slickness additive, the Amplitude series will shoot farther and last longer than any other line on the market. Its slickness down to a science. Weight forward fly lines can be tailored to a variety of tasks. However, sometimes a Double Taper is just the best tool for the job. Whether is a classic rod, a