Features: Accurately measure electric potential differences with high precisions metal probes, solving traditional measurement errors in physics education while demonstrating equipotential surfaces through innovative visualization technology. Hybriding construction and components for great performances in classroom environments, featuring tool frees modular assembly for quick experiment setups. Ideal for physics instructors and students seeking hands on learning tools to mastering abstract concepts like electric field distribution and voltages principles. Enhances STEM education efficiency with intuitive, reusable components that simplify complex electromagnetic theories into tangible experiments. Perfect for laboratory demonstrations and interactive classroom lesson, this equipment visually maps electrostatic fields. Specifications: Materials: Plastic, Metal Color: As The Picture Shows Package Weight: approx.300g Size: approx.20x24cm/7.87x9.44in Package Includes: 1Pc Physics Demonstrator 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!