ChemLight Military Grade Impact Light Sticks, Blue, 15" Long, 8+ Hour Duration, Tube of 5 ChemLight Military Grade impact light stick for providing illumination for up to 8 hours Measures 15" long and provides 360 degrees of illumination Made in USA - Not an imported substitute! Chemistry is non-toxic, non-flammable, and plastic body is phthalate-free for safety Four-year shelf life from date of manufacture