NiteCore NFB40 40mm Blue Lens Filter Diffuser

* Converts flashlights with a 40mm head diameter into a Blue light

* Ideal for hunting and as locator beacon in emergency situations

* Made from PC2805 high-grade plastic (Bayer Material Science AG)

* Highly resistant to extreme temperatures, thus ideal in harsh environments

* Toughened ultra-clear glass lens with anti-reflective coating provides heat resistance and maximum light transmittance

* Portable, lightweight and easy to attach and remove