Description Designed for experiment, this tiny light bulb can be a great helper for physical and electrical experiment. Made of premium material for long time and durable use. It has a simple design, but very practical in use, giving you a good using experience. Also can be a good gift choice for your friends, they will like it. Features -Color:Transparent Color -Material:Glass, aluminum -Size:2.30X1.00X1.00cm or 0.90X0.39X0.39in Voltage: 6V Socket: E10 - Mainly used for electrical experiments in primary schools and secondary schools with good results. - A great tool for learning physics and electrical experiments, as well as science DIY equipment for kids and elementary school students. - Can be equipped with switches, battery boxes, leads, etc. to build small lighting circuits. - It's lightweight and easy to carry, and students can take it outside to play with friends. - Outstanding workmanship, reasonable design, stable and practical, will bring you a good using experience.Packing list: 50 x light bulbs