Mag MagLite D-Cell Flashlight Accessory Pack. The clear lens is used to help protect vision in low light situations while the red and blue lenses help penetrate through smoke and fog. The blue lens is for situations where it is necessary to emit a light that will penetrate heavy fog or smoke. The red lens is also used to help protect vision in aircraft boats ships military operations police and security work. The blue lens will help produce a higher quality beam in fire or other hazardous situations. The black holster with retaining ring both retains the colored lenses and helps prevent the flashlight from rolling off surfaces. Specifications for MagLite ASXX376 MagLite D-Cell Flashlight Accessory Pack: Manufacturer: Maglite Fabric/Material: Plastic Flashlight Model: Maglite Additional Features: Accessory Pack Features of MagLite ASXX376 MagLite D-Cell Flashlight Accessory Pack: Colored Lenses Set (Clear Red Blue): The red lens is used to help protect vision in low light situations. General applications include: aircraft boats ships military operations police and security work. The blue lens helps penetrate through smoke and fog. Mag Instrument Mounting Brackets (Fit D-Cell Only): Mount your MagLite flashlight on surfaces in vehicles boats airplanes or homes. Lens Holder / Anti-Roll Device: This item both retains a colored lens and helps prevent the flashlight from rolling off surfaces. Note: The Lens Holder and Lenses may also be used on "C" cell MagLite flashlights. Package Contents: MagLite ASXX376 MagLite D-Cell Flashlight Accessory Pack Mag ASXX376 MagLite D-Cell Flashlight Accessory Pack