A Knotless, Tapered 100% Fluorocarbon Leader for the utmost in stealth. RIO's Fluoroflex trout leaders are made of 100% fluorocarbon, and are the perfect solution for when a nearly invisible presentation is required in clear water and for spooky fish. Each leader has high abrasion resistance and excellent tensile and knot strength, and have a long butt section that will turn over flies effortlessly. Size Chart3X: 0.008'' Diameter, 6 lb. Strength4X: 0.007'' Diameter, 5 lb. Strength5X: 0.006'' Diameter, 3 lb. Strength6X .005" Diameter. 3.1 lb. Strength | RIO Products Fluoroflex Trout Tapered Fishing Leader | Size 3X