Scientific Anglers Mastery Trout Freshwater Tapered Leader - Tapers optimized for general purpose trout fishing. Butt diameters selected for use with modern fly lines. Supple material for exceptional presentation; Water Type: Freshwater; Material: Nylon; Fishing Type: Dries, Indicators, Nymphs, Big Dries, General, Presentation, Stillwater; Species: Trout;