Opsin Fluorocarbon Leader – 25 lb (0.40 mm)Real world offshore validation: Opsin 25 lb give live bait a clean, natural presentation while maintaining the pull needed when tuna, yellowtail, and dorado commit. Built for fly lining sardines and anchovies in clear water when the difference between getting looked at and getting bit comes down to your leader. The clean live bait weight that needs real stealth and real pull at 0. 40 mm, the thinnest 25 lb leader in its class. 25 lb Diameter