ChemLightA(R) tactical lights are lightweight, durable and reliable. Recommended for marking routes, clearing areas, vehicle lanes, night patrol, combat operations and survival kits. Individually foil-wrapped for light/moisture protection. Each light stick is 4" in length and provides up to 6 hours of useful illumination. Made in USA. Meets Defense Logistics Agency (DLA) and NATO Maintenance and Supply Agency (NAMSA) specifications, and National/NATO Stock Numbers (NSN) are printed on each product. FEATURES ChemLight military grade light stick provides bright, reliable light for up to 6 hours Measures 4a ^2 long and provides 360 degrees of illumination Four-year shelf life from date of manufacture for a maintenance-free alternative to other lighting Meets military specifications: DLA, NAMSA Chemiluminescent substance is non-toxic and plastic body is phthalate free for safety Box of 100