Product Details Gamma 100% Fluorocarbon Leader Material has incredible strength, flexibility, and elasticity. This leader material is two times more shock resistant than other leading fluorocarbon lines. The natural refractive qualities of this line mean it is virtually invisible under water. Gamma 100% Fluorocarbon Leader Material surpasses the performance demands of professional anglers. Two times the shock resistance of leading fluorocarbon lines for battling powerful fish Strong, flexible, and elastic design with excellent knot reliability Virtually invisible underwater thanks to natural refractive qualities Quantity per pack: 1 Test (lb.) Diameter (in.) Diameter (mm) 2 0.005 0.13 4 0.007 0.18 6 0.008 0.20 8 0.009 0.22 10 0.010 0.25 12 0.013 0.33 16 0.015 0.38 20 0.017 0.43 25 0.019 0.48 30 0.021 0.53 40 0.024 0.61 50 0.026 0.66 Prop 65 Warning FishUSA Customer Reviews (8) Write a Review 5 FC Leader Materials Posted by Peter Alex (PA Sport Fishing Advisor) on February 7, 2023 The best FC leader material out there. I use is in streams and lake trolling. Never had an issue and has been through some epic tests on the back of my boat. The best FC leader material out there. I use is in streams and lake trolling. Never had an issue and has been through some epic tests on the back of my boat.