R18 is Seaguar Japan’s premier fluorocarbon mainline with top-of-the-line overall performance, delivering excellent performance in three key areas: strength, suppleness, and castability Soft, supple and very manageable - easy casting and very smooth coming off your reel created with Seaguar’s exclusive double-structure process with two custom Seaguar 100% fluorocarbon resins to create a line with exceptional knot and tensile strength Offered in 100-meter spools (109 yards) and available in 4 through 20 lb. tests including unique, nontraditional sizes: 5, 7, and 14 lb. tests R18 is part of the Seaguar JDM Collection — imported from Japan for tackle junkies, avid anglers and professional fishermen. The JDM Collection includes fluoro mainline, fluoro leader, and braid selections