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.