Description This is a safe set of lamp holders and light bulbs for electrical education. It helps children consolidate their knowledge from books and gain a deeper understanding of the basics of electricity. By setting up simple circuits, it will be easier for your child to learn basic electrical rules and improve students' practical ability, thinking ability, creativity, and improvement. Features -Color: Black -Material: Plastic, aluminum -Light bulb holder size: About 3.0 x 2.0 cm / 1.18 x 0.79 inch -Suitable voltage: 1.5-220V -Suitable current: u2264 2A -Model: E10 -Value set: The science teaching material includes lamp holders and small light bulbs. -First-class material: Made of premium plastic material for safe and long-lasting use. -Easy to use: Screw-type connection terminal on E10 light bulb holder for quick removal and installation of connection cables. -Develop abilities: Improve students' practical ability, thinking ability, creativity, and awareness of electricity. -Wide range of uses: Commonly used old flashlight accessory lamp holders, DIY science equipment in physics teaching, and so on. Packing list: 5 x Lamp holders 5 x Light bulbs