Features: This 24014 Electromagnetic relays Demonstrator is designed for physics education, featuring a visible electromagnetic systems and two contact design to visually demonstrate relays operations and circuit control principles in classroom experiments. Constructed with a iron cores, copper coil, and spring loaded armatures, the relays includes 1 normally open and 1 normally closed contact for hands on exploration of electromagnetic induction and automated switching mechanisms. Ideal for STEM educators in middle schools, universities, and science centers seeking interactive physics lab equipment to explain electromagnetic theory through practical demonstrations. Perfect for classroom experiments, sciences fair projects, or extracurricular workshops demonstrating real worlds applications in automation, remote control systems, and electromechanical device fundamentals. for standard lab power supplies and control circuits, this educational tool bridges theoretical concepts with tangible learning experiences while meeting curriculum requirements for physics teaching aid. Specifications: Materials: Iron Size: 15.5cm long, 10.5cm wide, 7.5cm high Package Includes: 1PC Electromagnetic relays note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.