Sufix Castable Invisiline Fluorocarbon Leader - 20 Pounds 200 Yards - ClearSufix Castable Invisiline 100% Fluorocarbon casts like mono and is virtually invisible. It is resistant to ultraviolet rays that can damage lines, it is incredibly strong, abrasion resistant and sensitive. There is a very low stretch index for optimal hook setting power and sinks 4 times faster than traditional nylon lines for getting your presentation to the strike zone faster. Castable Invisiline has exceptional handling for both spinning and