Nitecore NFB40 40mm blue filter for flashlights

Nitecore blue filter with a diameter of 40mm for flashlights. It converts the light to blue. The Blue filter is great for hunting because it makes blood trails stand out by making the blood appear black, which makes it easier to track an injured animal. Blue light won´t attract insects. It works with night vision equipment, produces less disturbing light, and is good for navigation or map reading as it show contour lines better than red. It is highly resistant to extreme temperatures and it´s made of toughened glass with anti-reflective coating. Portable, lightweight and easy to attach thanks to the flexible rubber frame. With the lens removed, the filter can be used as a bezel protector. Features a small lanyard hole.