What is this?Function on lighting a bulb. Widely used on the electrical experiment of home laboratory, the light source of the flashlight, the indicator light or warning light of the distribution box, etc.What will I get?Product Name: Lamp SocketColor: BlackMaterial: Plastic, CopperLamp Socket Size: 30mmx20mm / 1.18”x0.79"(D*H)Package Content: 5 x E10 Lamp SocketAre there any advantages of the product?Plastic Shell and Copper terminals. Copper has a good conductive, great for you to connect to the electric power source.How to use it?You can directly screw the bulb in and then wired it.What should  I notice?Please make sure your bulb is an E10 bulb before buying this socket.