Seaguar Blue Label Fluorocarbon Line Leader is preferred by anglers the world over. This fast sinking line has incredible impact and abrasion resistance, superior tensile strength, and 34\% better knot strength. Double-structure fluorocarbon also features level wind technology. Made of 100\% fluorocarbon leader material, this saltwater line allows you to use a smaller test leader than comparable nylons or fluorocarbons for unmatched bait presentations.