The Seaguar Tatsu Fluorocarbon Line is amazingly strong and abrasion resistant. Its superior, state-of-the-art double-structure process fuses two custom 100% fluorocarbon resins which creates the world&';s only double-structure main line. Fill your spool with Tatsu and you&';ll be amazed at this ultra thin, strong, and virtually invisible line. Spool Size: 200 yards Available Line Sizes Test (lb) Diameter (mm) Diameter (in) 4 lb .165 mm .007 in 6 lb .205 mm .008 in 8 lb .235 mm .009 in 10 lb .260 mm .010 in 12 lb .285 mm .011 in 15 lb .330 mm .013 in 20 lb .370 mm .015 in 25 lb .405 mm .016 in