Seaguar Fluorocarbon Leader Material 25yds. Available Sizes: 2lb, 4lb, 6lb, 8lb, 10lb, 12lb, 15lb, 20lb, 25lb, 30lb, 40lb, 50lb. Virtually invisible. Smaller Diameters. Incredible knot and tensile strength. Perfect shock leader. Extremely soft, with low memory. Seaguar Fluoro Premier and Seaguar Fluoro Premier Big Game. We took fluorocarbon to the next level. Ater all, we invented it.