Olight FM10 Filter for S10 S10R S20 S20R S15 S15R ST25 M10 M18 LED Flashlights (Blue) Made of rugged TPU, these filters slip over the head of the flashlight Fits Olight S10 S10R S15 S15R S20 ST25 M10 M18 M18 Striker LED Flashlights These are Original Olight Filter directly from the factory