Jinkai Premium Monofilament Line; the name Jinkai translates from Japanese to mean "God's Ocean". It's a name that represents the finest quality and performance standards in fishing gear. The Jinkai system begins with state-of-the-art monofilament line. Originally created in Japan after years of research and technical patents, the superiority of Jinkai line has remained unsurpassed. Commercial fishermen and serious sportsmen alike have recognized it as the proud choice for world class performance. Jinkai is a nylon copolymer monofilament line, a single fiber made from a blend of nylons. Extruded in a secret patent process, the nylon molecules are polarized to maintain the line's soft inner core, while the outer surface fains a tough, tight molecular structure. This allows Jinkai to remain pliable, sensitive, and responsive, yet provides incomparable strength in micro-fine diameters. The result is a unique combination of unbeatable qualities. Available in Blue and Clear 500YD, Blue 1100YD, Blue and Clear 1500YD, and Blue and Clear 1700YD Spools.