SureFire G2Z LED CombatLight Flashlight G2ZL-BK 2009 Model Virtually indestructible, electronically regulated light emitting diode has no filament to burn out or break; lasts for thousands of hours Precision reflector creates a smooth beam without dark spots or rings Rugged, lightweight, corrosion-proof Nitrolon body with anodized aerospace-grade aluminum bezel O-ring sealed; weatherproof Tough Pyrex window protects LED and reflector