Brand: WJPshopProduct Name: Electromagnetic experiment box Product Material: ABS, PP, metal, etc. Applicable People: children, elementary and middle school students Features: portable, easy to use, teaching aids Products Include: Ammeter Voltmeter Small lamp holder Single pole single throw switch Single Pole Double Throw Switch No. 5 battery box Hand crank generator gear box Hand crank generator motor Hand crank generator crank electric bell Electromagnet led Sliding rheostat Fixed value resistance Open motor Law of resistance Transparent friction rod Black rubbing stick Raw film silk Iron powder box compass Zinc flakes Copper sheet Copper rail Wind trolley base Large blade wheel Axle Combination pole 2.5v small bulb 3.8v small bulb Spare LED bulb Dedicated wire Alligator clip wire Magnetic car U-shaped magnet Bar magnet Ring magnet Enameled wire Nails Hollow copper rod screwdriver Small wrench manual Portable storage box