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/0.90X0.39X0.39inVoltage: 6VSocket: 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.Package list: 50 x light bulbs