Virtually invisible to fish, Orvis® Mirage Pure Fluorocarbon Trout Tippet paves the way toward fly fishing success better than any other tippet material. It has a specific gravity of 1.76, nearly twice the density of water, which means that it will belly below the surface film, eliminating any shadows that might spook the fish below. Made of the world's strongest pure fluorocarbon material, Orvis Mirage does not absorb water, so it retains its superior knot and tensile strength in all conditions. Abrasion-resistant, impervious to UV breakdown, it's simply the best fluorocarbon tippet available. Virtually invisible to fish; Nearly twice as dense as water; Sinks below surface film—no fish-spooking shadow; World's strongest pure fluorocarbon; Does not absorb water; Superior knot and tensile strength; Resists abrasion and UV degradation; Size Diameter Average Break Strength 7X 0.004'' 2 lb. 6X 0.005'' 3 lb. 5X 0.006'' 4.1 lb. 4X 0.007'' 5.5 lb. 3X 0.008'' 7.1 lb. 2X 0.009'' 8.7 lb. 1X 0.010'' 10.7 lb. 0X 0.011'' 13.2 lb.