Create tantalizing action deep in the water column with the U-shaped sink of Scientific Anglers Sonar Stillwater Parobolic Sink Fly Line. Seamless Density creates smooth transitions that ensure you remain in direct control over the fly all the way through the water column. Sonar sinking technology uses a mixture of tapers and tungsten to get your fly deep. Advanced Shooting Technology (AST) sheds dirt and grime and teams with dimpled Shooting Texture to enhance line speeds for excellent casting distance. Scientific Anglers Line Identification (SA-ID) allows you to identify the weight at a glance. 10- and 20-ft. textured hang markers. Welded loops let you quickly change rigging. Made in USA. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Fly Line.