★When a current is passed through the coil, a magnetic field is generated around the coil. This additional magnetic field can generate an external force to the upper permanent magnet, or push or suck. ★When a current is passed through the coil, a magnetic field is generated around the coil. This additional magnetic field can generate an external force to the upper permanent magnet, or push or suck. ★Made of high quality material, thus it is durable. ★Magnetic Levitation Coil ONLY, other accessories demo in the picture is not included. ★Material: Metal