Seaguar Fluorocarbon 150 Leader Line 150m Size 6 24lb (0850)150 meters of 24 pound test fluorocarbon leader line in Size 6 (0. 85mm diameter). Fully knot to knot tested for consistent strength. Low visibility underwater with high abrasion resistance. Stiff material resists tangling and handles sharp teeth or rough structure. Standard spool size for leader material. TARGET USE: Fluorocarbon shock leaders for saltwater or freshwater fishing with heavy lures, swimbaits, or when abrasion resistance is needed.