Scientific Anglers Bass Tapered Leaders - Specifically designed to handle larger bass flies and poppers, our freshwater nylon Bass leaders feature a heavy butt section and powerful taper that help turn over the largest flies. Available in three different breaking strengths, finely tuned to help you land those head-shaking, hard-fighting bass we all know and love. They feature the highest wet knot strength in the industry. You can fish the other stuff, or you can Fish the Truth.