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Scientific Anglers Sonar Big Water Taper Max Sink

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Our favorite line for truly powerful fish


In designing the Sonar Big Water Taper S.A. had one specific goal in mind: to create the world’s strongest fly line. Built on the industry’s first 100-lb. monofilament core, the Sonar Titan BWT Max Sink is built for the blue-water beasts of your dreams (or nightmares). With a super-fast sinking head and a core capable of pulling semi-trucks from the depths this is a line for big rods and fish that weigh more than you do.

Loads quickly and delivers the biggest flies to the furthest targets
Excellent turnover due to short, powerful head and short front taper
Mastery Texturing reduces friction, providing longer casts, easier pick-up, and increased durability
Built on a 100-lb. monofilament core
Tropi-core technology for tropical climates
Sink Rate: Sink 6 = 6.0+ ips

Line Size

500 GRAIN, 600 GRAIN, 700 GRAIN