Diamond Presentation Fluorocarbon Leader Material - When money is on the line it is all about PRESENTATION! Diamond Presentation Fluorocarbon Leader Line gives the angler the added advantage when pursuing those line shy game fish. Fluorocarbon line has a refractive index very close to that of saltwater making it virtually invisible. It is also much denser and does not absorb water like nylon monofilament, so it sinks much faster than ordinary monofilament lines. This line also exhibits very good abrasion resistance characteristics.