Semperfli's Classic Waxed Thread 6/0, available in 240 yards, is part of their 150 denier range, designed for tying large flies for Salmon, Predators, and Streamers, as well as deer hair spinning. These threads lie flat, have a two-core construction, and can be easily split for dubbing loops. They're strong and have just the right amount of wax to hold materials without clogging your bobbin holder. Our computerized spooling ensures even, touch-turns, preventing birds nests while tying.