ChemLight Military Grade Chemical Light IMPACTA(R) Sticks, 15a ^2 ( CASE - 4 TUBES ) The ChemLightA(R) IMPACTA(R) emergency glow stick is the only light stick of its kind that illuminates on impact. With this versatile 15" light stick, a bend, snap and shake is not necessary. Ideal for not giving away position in a tactical situation or confined space rescue, the IMPACT light stick will provide bright, reliable light for up to 12 hours depending on the chosen intensity. Two end rings make the light stick easy to hang or string together. IMPACT sticks are waterproof, nonflammable and non-toxic. 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 15a ^2 Length Waterproof, non-toxic and fire-resistant Thin glass ampule allows light stick to illuminate on impact 2 end rings to hang or string together Sold by the tube or a case or 4 tubes Made in the USA to ensure quality