Check the listing for details. Seaguar InvizX Fluorocarbon 600 Yards - Leader or Mainline Castable Fluoro Line. Condition: New. Listed at 56.49 USD. Seaguar InvizX Fluorocarbon 600 Yards - Leader or Mainline Castable Fluoro Line Seaguar InvizX Fluorocarbon is soft, supple, and castable.It is designed to be used as a mainline for freshwater fishing applications.Provides great hook sets and knot strength, and it is smooth enough for casting on both spinning and casting reels.Made from Seaguar's proprietary resin blends.Virtually invisible under water. Seaguar InvizX Fluorocarbon 600 Yards is a castable, supple and soft line fluorocarbon. It is designed to be used as a mainline for freshwater fishing applications providing a great hook setting and knot strength, and smooth casting on both spinning and casting reels. This line is made from 100 percent exclusive Seaguar resins.