Rovex Mono Fishing Leader is a leader line made using state-of-the-art copolymer nylon technology to create a reliable and durable mono fishing leader with an excellent strength-to-diameter ratio. This Fishing Leader Line is easy to handle and to tie knots with. The knot strength and crimp strength have made it very popular among serious sport and gamefishers who demand a tough leader that can land Australia's toughest fish. 100m spools of Rovex Mono Leader line are available in 10 popular leader strengths from 20lb to 400lb. GREAT VALUE PREMIUM NYLON MONO LEADER!