This blue filter will complement your NiteCore flashlight (with a 40mm head) nicely but it will fit any flashlight with a head diameter of 40mm. Turn the beam of your flashlight blue with this high quality filter from NiteCore.

Features:

• Impact-Resistant Frame Construction
• Weight:15g
• Material:Plastic
• Compatible with NiteCore EA4,MH25,P25 or others 40mm Flashlights