Using CNC programmed machine, the NexTORCH 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, NexTORCH uses the best LEDs available, a product called uxeon LED. The excellent light source can produce the long span-life (over 100000 hours, which means you can continue using it for over 10 years!).And its light efficiency is 5 times higher than incandescent regular bulb. MODEL: Z3 MATERIAL: Hard-anodized aerospace grade aluminum 6061 T6 COLOR: Titanium black DIMENSIONS: 134mmX27mm(33mm Head Diameter) BATTERY: NT123A 3V Lithium battery X 2 BULB: LUXEON EMITTER 3W LED LENS MATEWRIAL: Full Clear Glass Lens LIGHT OUTPU: 60 Lunmen RUN TIME: up to 95 minutes of continues use SWITCH: ON/OFF/FLASH WEIGHT: 121g(Batteries Not Included)