Scientific Anglers Sonar Titan GT Fly LineYouve 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. Loads quickly and delivers the biggest flies to the furthest targets Excellent turnover due to short, powerful head and short front taper Specially designed for tropical environments Built on a 65 lb.