Product Details Blood Run Tackle Fluorocarbon Leader Material gives salmon, steelhead, trout, and walleye anglers a tough, low-visibility leader option for trolling spoons, plugs, flies, meat rigs, and other clear-water presentations. Made from 100% pure fluorocarbon with high-quality Japanese resin, this 50-yard leader material has an ultra-smooth finish, strong abrasion resistance, and a slight amount of flex and stretch while maintaining the sensitivity needed to track strikes and lure action. Its underwater invisibility helps when fish key in on clean presentations, and its UV-resistant construction holds up against sun exposure through long days on the water. 100% pure fluorocarbon leader material made with high-quality Japanese resin Ultra-smooth, durable construction with slight flex, stretch, and strong sensitivity Nearly invisible underwater for clear-water trolling and leader-shy fish UV-resistant with enhanced abrasion resistance for trolling applications Spool length: 50 yards Quantity per pack: 1 Test (lb.) Diameter (in.) Diameter (mm) 4 0.006 0.21 6 0.008 0.2 8 0.009 0.25 10 0.010 0.28 12 0.011 0.29 15 0.012 0.31 Prop 65 Warning FishUSA Customer Reviews (2) Write a Review 4 best cold/cold water… Posted by Wildlife Whisperer on December 1, 2023 I fish cold like salmon river NY for Steelhead cold. Most lines don’t hold up let alone leaders. Used 6lb and killed it last trip, didn’t loose a single fish. I fish cold like salmon river NY for Steelhead cold. Most lines don’t hold up let alone leaders. Used 6lb and killed it last trip, didn’t loose a single fish.