Bright marks, sharper strikes Scientific Anglers Indicator Markers offer a quick, effective way to turn monofilament into a high-visibility sighter or strike indicator. Designed for fly anglers who need to detect subtle takes in varying light conditions, these ultra-thin markers apply easily, dry fast, and stay put without adding drag or bulk to your leader setup. Heat stable and waterproof, they perform in all weather and can be removed with alcohol wipes for easy line maintenance. Ideal for precision nymphing and technical presentations. Features Marks monofilament to create sighters or strike indicators Fast-drying and waterproof for long-lasting visibility No colour transfer once dry Bright colours remain visible in all light conditions Applies ultra-thin to prevent added weight or drag Heat stable for hot-weather use Easily removable with alcohol wipes