Features: This electromagnetic field lines demonstrator set enables visualization of electric field strength and direction through different experimental configurations. Crafted with glass panels and precisions engineered circuit board, the set creates clear particle alignment patterns when connecting to electrostatic generators. Great for middle school physics educators and STEM instructors seeking interactive classroom tools to demonstrate electromagnetic principles. Perfect for conducting laboratory comparisons of electrode configurations, or illustrating Coulomb's law applications in secondary education settings. Ensures uniform particle dispersion for consistent experimental results, terminals maintain safe conductivity across repeated classroom demonstrations. Specifications: Materials: Glass Color: As The Picture Shows Package Weight: approx.315g Size: approx.10x8cm/3.93x3.15in Package Includes: Set of 5Pcs Electric Field Line Demonstration Board note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!