100% Brand new and high quality Once they start glowing, glow stick bracelets will last you all night. They will glow super bright for 3 - 5 hours. Then, they will start to fade out but may continue to emit some light for up to 12 hours. Inside the glows tick 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 and they are not flammable. The almost never break open, but if they do, the chemicals inside can be washed off skin and clothes with ordinary soap or detergent. Suitable for halloween, new year\'s eve, church/school fundraisers, bathtub toys for tots, parties, weddings, bar mitzvahs. Come with connectors so you can hook the ends together to make bracelets and necklaces, or more style. Size: 20cm x 0.5cm. Color: multi colors Specifications: Party Fluorescence Light Glow Sticks Bracelets Necklaces Neon Wedding Party Stickers Package Included: 100*Sticks 100*Connector NOTE:Children should be accompanied by their families when using it. Children should not bite it. This product is the manufacture of the machine, about 1 to 2 pieces do not work, it is normal. Thanks for your understanding!