This product is a light bulb kit for teaching electricity. Help children consolidate book knowledge and deepen their understanding of current basic knowledge. By building simple circuits, it will be easier for your children to learn basic electrical rules, and improve students' hands-on ability, thinking ability, creativity, and progress. Features -Color: As shown -Size: 2.00X1.00X1.00cm/0.79X0.39X0.39in -Material: Glass, alloy -Note: For E10 led lamps only -Premium material: Made of premium glass and alloy material, safe and reliable for use. -Gentle lights: E10 screw bulbs have a warm gentle light and it won't hurt your eyes. -Easy to use: The screw-type terminal of the E10 lamp base allows quick removal and installation of the connecting wire. -Cultivate ability: Improve students' hands-on ability, thinking ability, creativity, and electrical awareness. -Wide range of uses: commonly used old flashlight accessories, lamp holders, DIY science equipment in physics teaching, etc.Package list: 10 x Light Bulbs