Color: 7 Colors.Diameter: 4cm.Length: 47cm.Material: Foam.Package Included:2/5/10/20/30 pcs Light Up Foam Sticks. Turn on the switch , the LED Light stick will keep flashing and light color is colorful. Can be reused by replacing the batteries, making it more environmentally friendly than most glow sticks. Be sure to pull out the insulating sheet before use. Can be widely used for party ,festival,birthday , wedding ect.