Features:100% Brand New and High Quality;They will glow super bright for 3 - 5 hours. Then start to fade out but may continue to emit some light for other 12 hours;Inside the glow stick bracelets are two chemicals that emit light or glow when they are mixed together.Inside the glows tick bracelets is a thin glass tube, when you bend it for the first time, you break the inner glass tube.This mixes the two chemicals together.Just shake it up and presto, it starts glowing like magic. They are not radioactive or flammable.Durable, not easy to be broken, if they do, the chemical liquid may pollute your cloth, skin, and things around;Suitable for festive days;Come with connectors so you can hook the ends together to make bracelets and necklaces, or other styles as you like;Material: Chemical LiquidLight Color: 7 Color RandomSize: 200 x 5mm (L x D)Warning:We advice you not to break this item by knife and make liquid inside outflow, cause this chemical liquid will pollute things around you.If the liquid enters your eyes by chance, please clean the eyes by fresh water, or go hospitalNever try to taste the liquid Please watch your kids if they are playing this glow sticks Package Included:100pcs Glow Sticks100pcs Connetors(Please allow a little error)