Scientific Anglers Frequency Sink Tip Fly Line Ideal for streamers and wet flies for trout, steelhead, salmon, and smallmouth bass in moving water Fast-sinking 10' tip sinks flies through the water column Mid-length head enhances control WF-6-S Sink tip line Fast-sinking 10 foot tip Mid length head enhances control Green tip/optic yellow Sink rate 2.5 - 4.0 ips