Nitecore Red Green 40mm Filter Diffusor for MH25 EA4 SRT7 P25 CG6 CR6 P16 NFR40 NFG40 This Nitecore filter is compatible with models that have the flashlight head diameter of 40 mm Mineral glass coated on both sides Filter holder is made of high quality rubber Increased durability and impact resistance It is equipped with a hole for attaching the cord