Until now, the most effective taper design for a fly leader has only been possible by hand-tying. Now, the materials and machinery used in producing the knotless White River Fly Shop Trout Leader create a uniform 50% butt section with a rapid stepdown to an energy-dissipating tippet section, for flawless turnover every time. Formulated for suppleness. Length:9. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Tippets.