Features: Demonstrate precisely electrostatic charges distribution with this metal physics teaching tool, designed to eliminate uneven charges issues in traditional classroom experiments for accurate science demonstration. Featuring optimized metal conductors and insulated plastic components, this educational lab equipment ensures visible charges movement pattern while maintaining structural integrity through repeated classroom demonstrations. Essential for school physics teachers, university laboratory instructors, and STEM educators requiring professional electrostatic demonstration equipment for interactive student engagement. Effectively demonstrates Coulomb's Law and charging polarization principles in classroom settings, science labs, and experimental workshops through hands on electrostatic visualization. Engineered with sturdy metal components for quick setup, this physics teaching aid enables clearly observation of charges behavior while meeting strict classroom safety standard. Specifications: Component:Metal Plastic Color: Silver Size: Approx. 21x17cm/8.27x6.69in Working temperature: 0~40°C Relative humidity: ≤65% Weight: Approx. 300g Package Includes: 1Piece Electrostatic Distribution Demonstrator note: 1.Please allow 0-1cm error due to manual measurement. Be sure you donot mind before bid. 2.Due to difference between different monitors, the picture may not reflect the actual color