Features: Designed with metal foil leaves, this electroscope accurately detects electricity, solving the sensitivity issues of traditional devices for physics labs and classroom demonstrations. Combining plastic and metal materials, this electroscope ensures long time performances, resisting daily wear better than all plastic models, ideal for frequent classroom use. Features a transparent casing for easy viewing from any angles, allowing students to clearly visualize charging distribution without complex operations, enhancing classroom engagement. Compact and portable designs makes it easy to carry between classrooms or store after use, suitable for teachers and students conducting experiments. Manufactured with processes to sensitivity and accuracy, making it practical tool for teaching electrostatic principles in physics education. Specifications: Materials: Plastic, Metal Size: 5x3x6.5cm/1.97x1.18x2.56inch Package Includes: 1pc Electroscope Physics Teaching Tool Set note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.