Black Magic Tough Fluorocarbon is a low visibility leader made from high performance 100% fluorocarbon for both saltwater and freshwater applications. Low visibility leader - almost invisible in water - with extreme abrasion resistance and knot strength, the Black Magic Tough Fluorocarbon is another great fishing line from the awesome range by Black Magic! Available in a variety of strengths from 15 to 80 lb to suit a great range of fishing purposes.