Description If you are looking for a professional and affordable mini light bulb, then your research is over here. That's because our product can satisfy your need. It makes easier to use in physical electricity experiment for laboratory and students teaching, suitable for middle school use. Features - ColorSilver - Material: Glass. - Size: 2.20X1.00X1.00cm/0.86X0.39X0.39in - Voltage: 2.5V. - Current: 0.3A. - They are mainly used in electrical experiments of middle and primary school. - With these small bulbs, students can learning many things about electricity and science. - Can be used to build small lighting circuit with other experiment kit (not included). - It is lightweight for easy storage and carrying, they are good tools for teaching. - It is manufactured with professional technology to ensure the good lighting effect.Package list: 10 x Light Bulbs