Inova T3-WB 100 Lumen LED Flashlight with Knurled Black Hard Anodized Aluminum Housing Aircraft aluminum body machined from solid bar stock with military grade; type III anodized hard coat and capped with a black head Lifetime LED bulbs are virtually indestructible, delivering 100-lumen output; crush proof to 2000-pounds Power regulated circuit for constant, non-dimming brightness up to 2-hour battery life Double AR-coated mineral glass optical window with Teflon* seal that counters environmental pressure (*Teflon is a registered trademark of Dupont) Shock proof, crush proof and water resistant construction