100% fluorocarbon leader line This hard version of Seaguar Ace has been specially formulated to give maximum abrasion resistance for salmon and saltwater game fishing whilst maintaining the other properties of Seaguar/Riverge. Seaguar Ace is now the favourite leader material for salmon and saltwater game fishing around the world. Seaguar knots and casts extremely well, and its stiffness quality particularly helps to turn over large flies. Available in 50m spools.