See every strike before it gets away. Cortland Indicator Mono is a high-visibility bi-color monofilament designed to help you build custom leaders with built-in strike detection — no separate indicator needed.The bi-color construction creates a clear visual transition point in your leader that telegraphs subtle takes instantly, making it ideal for Euro nymphing, tight-line techniques, and any situation where reading the drift is critical. Available in two diameters to match your leader setup. Bi-color construction for instant visual strike detection Eliminates the need for a separate strike indicator Available in .007" / 6.3 lb and .009" / 8 lb Ideal for Euro nymphing, tight-line, and indicator leader builds From Cortland — trusted by competitive and technical nymphers