PURE FLURO: The Trout Magnet Phantom is pure 100% fluorocarbon leader material specifically made for reducing underwater line visibility FISH CAN’T SEE IT: That means it helps get more bites in clear water while drifting lures like the Trout Magnet LARGE SPOOL: The large 50mm spool lasts longer and allows for more leaders compared to other spools on the market. FLY OR SPIN: This Phantom leader is great for both fly fishing, and spin fishing small lures or baits ALL YOU NEED: Include this great line into you fishing equipment:; Set your drag, play the fish, and net everything you catch; 2lb, 3lb, 4lb Test.