Seaguar's low-visibility Fluorocarbon Leader has a refractive index much lower than that of monofilament, making it nearly invisible. Offering superior abrasion resistance and knot strength, this high-tech 100% fluorocarbon leader sinks faster in water than other lines due to its higher specific gravity. Unmatched presentations and designed to hold up in the harshest saltwater environments. Color: Clear. 25 yard spool. Low-visibility Superior abrasion resistance and knot strength Fast sinking Durable enough for use in harsh saltwater environments