Tubertini Gorilla UC4 Fluorocarbon Line: A line produced in Japan with a high percentage of polyvinylidene fluoride. Tubertini Gorilla UC-4 is an excellent line, suitable for both boat fishing and for casting. Therefore; thanks to its lightness, knot strength, and suppleness. A very popular line with sea match anglers and trout anglers, the Gorilla UC-4 offers brilliant value for money, performance, and reliability. Typically Gorilla fluorocarbon line is approximately 33% thinner than similar fluorocarbons produced elsewhere but without any performance loss. 100m spool.