Nitecore NFR40 Highgrade filter Red for 40mm diameter flashlight

Info

Nitecore NFR40 Highgrade filter Red for 40mm diameter flashlight
This filter converts flashlights into a Red light. Red light easily penetrates fog and smoke, and is ideal as location beacon in emergency situations.
The housing of this filter is made from high grade plastic, is and resistant to extreme temperatures. The glass lens with anti-reflective coating provides heat resistance and maximum light transmittance.