Scientific Anglers Frequency Double Taper Floating Fly Fishing Line - Here's an idea: instead of spending $100 on a trout line, pick up a Frequency Trout fly line and use the rest on your next drive-all-night road trip. The Trout taper features a versatile, mid-length head ideal for delicate dries; however, it also provides great line control for nymph rigs. If you're a trout angler, this is your Frequency. nymph rigs. If you're a trout angler, this is your Frequency. All-around trout fly line Versatile taper excels with most flies and conditions Excels in all weather conditions Mid-length head Formulated with Advanced Shooting Technology Braided multifilament core