The Thinking Anglers Tint Link Fluorocarbon Hooklink is a high quality hooklink material manufactured from top grade PVDF Polyvinylidene fluoride. It is designed as a fast sinking, robust hooklink that also works well for building your own booms and leaders. Its refractive index makes it virtually invisible underwater, and it is available in 0.45mm or 0.50mm diameters that allow for perfect crimping. - Pure 100% PVDF Fluorocarbon - Fast sinking and robust - Refractive properties make it practically invisible