Principle:No heat, flame and sparks, no battery required Advantage: Non-toxic, non-flammable, non-radioactive, wat Erproof Certification CE,SGS,ASTM,MSD,SVHCSize 15mm*180mmGlowing time 5-24 hoursStorage life up to 2 yearsColor multiple colors orange, yellow, green, blue, purple, pink, red and availablePackingPacking 1 glow sticks/ foil bag , 50 foil bags/ 1 inner box, 4 inner boxes/ 1outside boxN ...