Ocea EX Fluoro Leader is a premium quality fluorocarbon leader material for carp, predator and big game fishing that offers many benefits when angling. Because its refractive index is very close to that of water, it is virtually invisible. In addition, it is sinking, incredibly hard-wearing and knots exceptionally well, even in the thicker diameters. Ocea EX Fluorocarbon, produced in Japan, has a high tensile strength in relation to its diameter. EX Fluoro Ocea Leader offers a number of benefits to discerning anglers facing the toughest challenges. The secret to the Ocea EX Fluoro Leader's ultra-high performance lies in its construction. A soft fluorocarbon core provides excellent knot strength, while a hard shell provides the abrasion resistance needed when fishing around stones, rocks and obstacles. Finally, a fluorine coating has been added to provide a smooth surface that allows the knots to be tightened correctly without damaging the line.