Scientific Anglers Sonar Musky Fly Line Scientific Anglers Sonar Titan Full Intermediate Fly Line Fishing Scientific Anglers Sonar Sink 25 Cold Fly Line Fly Fishing Scientific Anglers Sonar Trout Express Fly Line The Compleat Angler Scientific Anglers Sonar Stillwater Clear Camo Fly Line Bend Fly Shop. Powerful head to turn over extremely large flies Reinforced loops Oversized running line for increased line management and positive strip sets. Intermediate running line and Sink 5 head works well for lakes and rivers For use in moderate climates Braided multifilament core