Our led flashlight using CNC programmed machine,the UNIVERSE 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. As the importance of the bulb, HY TORCH use the best LEDs available,a product called Luxeon LED.The excellent light source can produce long span-life(over 100000 hours,which means you can continuous use it for over 10 years!).And its light efficiency is 5 times higher than regular incandescent bulb. WEBSITE: The directly manufactory !