Scientific Anglers Mastery Euro Tactical Nymph Mono Core Fly LineBuilt to FIPS Mouche standards, but designed to simply catch fish, the Mastery Competition Nymph line is as simple as it gets: 80 feet of level line. It doesnt matter if youre in an international competition, or just trying to outdo yourself, the Euro Tactical Nymph Mono line will perform, fish after fish. Specifically designed for European style nymphing, if youre looking for the thinnest, most sensitive line available, look no further. Ultra thin