Product Description parameter Product material: ABS+chrome plated iron Packing size: 295x200x60mm Product weight: about 1KG Applicable people: primary and middle school students, teachers Checklist Ammeter Voltmeter Fixed value resistance Sliding rheostat diode Single pole single throw Lamp holder Single pole double throw Battery case Open motor Electromagnet compass Iron powder box Bottom plate Suspension stick Baffle Magnetic car U-shaped magnet Bar magnet Round magnet Copper sheet Zinc flakes Small bulbs wire screwdriver 5AA battery LED lamp beads Storage Box Note: Try to avoid chromatic aberration due to different display or lighting conditions. The size of the product has a small error range of 0.5-1cm. Please refer to the actual product, please understand. If you have any questions about our products, please contact us in time, we will give you a satisfactory answer within 24 hours!