The Seaguar JDM Grand Max Fluorocarbon Leader combines low stretch with maximum strength and sensitivity through an exclusive double-structure process of two custom Seaguar 100% fluorocarbon resins. The JDM Grand Max Seaguar Fluorocarbon Leader was invented in Japan in 1999. This leader has a high-density interior resin that increases its tensile strength and sensitivity. On the other hand, its softer exterior resin enhances its knot strength. This leader is a low-stretch fluoro leader with smaller diameters, making it very manageable and easy to work with. Seaguar Japan's Grand Max is a high-quality fishing line on a pocket-thin spool that is easy to carry. The spools have a built-in connector, allowing you to connect spools of different pound tests together conveniently. It is available in a range of sizes from 2 lb. to 40 lb. tests, including unique pound test sizes of 3, 7, 17, and 35 lb. Grand Max is part of the Seaguar JDM Collection, imported from Japan specifically for fishing enthusiasts and professional anglers. Built with an exclusive Double-Structure process with two fluorocarbon resins to create a line that's both strong and supple Low memory makes line management easy Level wind eliminates cross-contact of line to maintain strength and for enhanced castability Test Diameter Diameter 2 lb. 0.004 in. 0.104 mm 3 lb. 0.005 in. 0.128 mm 4 lb. 0.006 in. 0.148 mm 5 lb. 0.006 in. 0.165 mm 6 lb. 0.007 in. 0.185 mm 7 lb. 0.008 in. 0.205 mm 8 lb. 0.009 in. 0.220 mm 10 lb. 0.009 in. 0.235 mm 12 lb. 0.010 in. 0.260 mm 15 lb. 0.011 in. 0.285 mm 17 lb. 0.012 in. 0.310 mm 19 lb. 0.013 in. 0.330 mm 24 lb. 0.015 in. 0.370 mm 27 lb. 0.016 in. 0.405 mm 30 lb. 0.017 in. 0.435 mm 35 lb. 0.019 in. 0.470 mm 40 lb. 0.020 in. 0.520 mm