Feature 1INCLUDED TOOLS: The kit includes helical coil, electromagnet coil, electric bell and electric hook, all tools are in plastic case for easy use and portability. 2MAIN PURPOSE: Study the relationship between current and magnetic strength and the relationship between helical coil turns and magnetic strength. 3TEACHING AID: Can be used in teaching experiments to help students understand electromagnetic knowledge, is a good auxiliary experimental instrument. 4DURABLE MATERIAL: These tools are made of copper and steel to ensure good electrical conductivity, and not easy to corrode or wear for a long service life. 5MULTIPLE USAGES: Learn basic electromagnetism and basic circuits, understand fundamental principles, and help students learn, think, and explore.Item Type: Electromagnet Test SetMaterial: ABS, Copper, SteelUse: Teaching experiment .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Helical Coil1 x Electromagnet Coil1 x Electric Bell1 x Electric Hook1 x Plastic Box