Fenix Diffuser Lens is specially designed for Fenix headlamp and flashlight to diffuse the lighting beam with easy assembling, it can be used for short distance reading or used as a camping light with flashlight. With open type structure design, Fenix Diffuser Lens fit to headlamp or flashlight with diameter from 20mm to 21.5mm. Fits Fenix HP10 Headlamp and LD10, LD20, PD20, PD30 flashlights.