UNIVERSE INT'L GROUP the main manufacturers Aluminium flashlight . the light Using CNC programmed machine,the hy flashlights are made from aerospace-grade aluminum with Milspec black anodized finished.As the flashlight can resist water as the rubber O-rings are installed. hy Xenon bulb are filled in high pressure(40kg/cm2),pure(99.999%)Xenon gas to protect tungsten filament,that improves 2 to 4 times power efficiency than regular incandescent bulb.Also it increase the color temperature more than 3250K,which make the light color much more closer to the natural light. More infromaiton please visit website : We are looking for the seller all world . Best Regards, Alice Deng