Pline CFX Fluorocarbon 27yd Leader Spool. Available Sizes: 4lb, 6lb, 8lb, 10lb, 12lb, 15lb, 20lb, 25lb, 30lb, 40lb. CFX Fluorcarbon Leader CFX Fluorocarbon’s refractive index makes it virtually invisible once it enters the water. The most obvious advantage of CFX Fluorocarbon is a more natural presentation to the fish. With its high abrasion resistance, low stretch factor and UV protectors, it’s no wonder that when it was introduced, the American Sportfishing Association awarded P-Line CFX Fluorocarbon “Best New Line Introducion of the Year”. If you’re in conditions with line-shy, leader-shy, using CFX Fluorocarbon can make the difference between excuses why they didn’t bite, or the bragging of that catch of a lifetime. This could be the most important tool you add to your tackle arsenal.