Designed for educational purposes, this screw-type lamp holder and bulb set is Suit for exploring electrical circuits. It allows for both series and parallel connections, making it a versatile tool for physics experiments. This set is ideal for classrooms and home learning, offering a hands- to understanding electricity. Features -Color:Black -Material:Plastic, copper -Size:7.50X3.50X2.60cm/2.95X1.38X1.02in -Quick installation: the screw socket design ensures a fast and straightforward installation process, making it userfriendly for everyone -Adjustable lighting: the electrical circuit design allows for bulb brightness, providing the Suit lighting for any situation -Energy efficiency: the circuit design is engineered to save energy, reducing electricity consumption and promoting practices - construction: made from plastic and copper, this product is designed to last, offering longterm durability -Educational tool: Suit for school labs and technical courses, this product is ideal for teaching and building various electronic projects Package list: 4 x screw lamp holder