ToolUSA 12 Inches Snap And Shake Glow Stick (color May Vary): SF-00712-Z04 : ( Pack of 4 Glow Sticks ) Individually wrapped 12 inches long glowing stick Bend to snap, then shake and you will be provided with about 4 hours of glow! Great for outdoors and even can work underwater! - provides 360 degrees of illumination Has a hook for hanging - put it in a campsite or tie it on a string and use it as a necklace Great for children, entertainment, parties, emergencies, and more