Opsin Fluorocarbon Leader – 180 lb (1.41 mm)

Built for giant tuna, marlin, and top-end offshore predator applications when maximum strength is the only specification that matters. The heaviest fluorocarbon in the Opsin lineup — for situations where stepping down is no longer an option. There is no next spool.

Why It Gets Bit:

• The heaviest, most purpose-built leader in the Opsin lineup — for situations where every other class has already been ruled out and the target demands the top of the range.
• Optimized for extreme crimping, heavy tackle systems, and elite offshore pressure — consistent material at maximum diameter for applications where the setup has to be right and there's no margin to fix it mid-fight.
• Built for anglers who need absolute confidence in the connection — not an upgrade or an experiment — the class for committed big-game anglers who know exactly what they're fishing for.
• Reads like top-end technical gear, not generic heavy line — because at this size, the application is specific and the anglers who use it know exactly what they need.

Best Uses:

• Giant tuna, marlin, and top-end offshore predator applications — the heaviest fish and the most extreme offshore scenarios in the catalog
• Heavy tackle systems and maximum-strength leader wallets — purpose-built setups where nothing lighter is a realistic option
• Big-game anglers who need the top of the range — when 150 lb has already been fished and the target still demands more

Specifications:

• Test: 180 lb
• Diameter: 1.41 mm
• Length: 25 yd / 30 m / 110 m
• Material: 100% Fluorocarbon (PVDF)
• Origin: Slow-extruded in Japan
• Spool: Built-in line holder + magnetic core for clean storage between rigs