The cheap Chinese glow necklaces you find elsewhere are 5mm thick and not all that bright, plus they only last a couple of hours. These American made glow bracelets are a nice thick 6mm that results in 44% more glow for your money. Glows up to 6 hours. Comes in full tubes of 50 22" Necklaces in a single color, with connectors. What makes these snap & glow Necklaces better then the rest is the new NON TOXIC hyper luminescent liquid that produces flooding amounts light and last much longer then traditional novelty snap & glow items. Comes to you securely packed in a crush proof tube to ensure safe, unactivated condition upon arrival.