This is an accessory for Fenix flashlights which own outstanding filtration ability to maintain strong red, blue, or green light, and it could be used as signal lamp or weft when necessary.
Features:
Uses a toughened ultra-clear glass lens with anti-reflective coating that provides heat resistance and maximum light penetrability
Anti-roll design, easy to attach, eay to remove
AOF-S+ filter lens(blue/green/red) compatible head diameter 25.4mm