The Fox Illusion Fluorocarbon Leader Clear is ideal for use as a shock, snag and invisible leader. This extremely fast-sinking, transparent fluorocarbon is virtually invisible in clear water. With minimal stretch, high abrasion resistance and top quality knot strength, it offers excellent performance in challenging fishing conditions, where a reliable leader is essential. Available in 30lb (0.50mm) and 40lb (0.60mm), on convenient 50-meter spools.