KastKing TriPolymer Advanced Monofilament fishing line is a next-generation tri extrusion nylon line. Incorporating soft and supple Nylon 6 with Nylon 6.6 for strength and Nylon 12 for its high abrasion resistance, the proprietary process yields an advanced monofilament with long life, greater knot strength, and low light refraction. Virtually invisible to fish underwater, the KastKing TriPolymer is very similar to fluorocarbon in this manner. KastKing Advanced Monofilament TriPolymer also shows off a smooth surface unlike any other monofilament. You'll cast further with very little friction through the rod guides using the line. Additionally, the mono averages 12% lower stretch than what you'll experience with traditional copolymer monofilament. The advantage - feel the slightest bites and more powerful hook sets! Not fluorocarbon, not monofilament, you'll get the best of both worlds when using KastKing TriPolymer Advanced! Incorporates three types of nylon Supple fishing line that's highly abrasion resistant and virtually invisible underwater Smooth surface unlike any other monofilament Stretch factor that averages 12% lower than traditional copolymer monofilament Quantity per pack: 1 Test (lb.) Diameter (in.) Diameter (mm) 4 0.006 0.15 6 0.007 0.18 8 0.008 0.20 10 0.009 0.22 12 0.010 0.25 15 0.011 0.28 17 0.012 0.30 20 0.013 0.33