Don't hit or press hard to prevent damage to the instrument and affect the experimental results. High- quality material and fine craftsmanship, and sturdy for a long time. Demonstrate the Oersted experiment, the magnetic field and electric induction of electric current in middle school physics teaching A simple and practical teaching and experiment equipment in middle schools. Also suitable teaching, learning and display collectibles, be an important complement of laboratory materials. The square coil is composed of wires, coil formers and wiring forks.Perfect experimental equipment for showing the phenomenon of electromagnetics or electromagnetic induction. support tool that can be used in laboratory equipment for physical or lab decoration for enhancing the effectiveness of learning physics experiments., Weight: 47.0 pounds, Manufacturer: IJSDNVJNDX