RIO Elite Predator Fly Line S5/S7Designed To Cast Large, and Heavy Flies With Low Stretch, Ultra Slick Performance Whether fishing for trout, bass, northern pike, or musky there are times when a large fly is the best option, and RIOs Predator line series is designed specifically to cast them easily. Featuring a short, powerful front taper and plenty of weight at the front, the lines have no problem casting the biggest of flies with ease. Whether floating or sink tip, each line is