Absolute fluorocarbon leaders and tippet boast a 15% higher wet knot strength compared to Scientific Angler's previous material and features incredible clarity and abrasion resistance. Features Include: 100% fluorocarbon for ultimate stealthy presentations, Supple for drag free drifts, Sizes: 7X – 0X, Length: 30m spools in all sizes, Silicone band protects tippet from UV exposure, Patented cutter spool design.