Description: Product : This is a foil electroscope, an essential tool for measuring the potential difference between two charged bodies Material: The pointer electroscope is made of metal and glass material, ensuring its longevity and reliability in use Product Dimensions: With a size of 12.2cmx14.7cm, this electrostatic experiment equipment is compact and easy to handle, making it suitable for both classroom and lab settings Educational Tool: This pointer electroscope is for demonstrating the principles of electrostatics in a classroom setting or at home for educational purposes Package Includes: The package includes 2 pieces foil electroscope physics experiment equipment, ideal for teachers use in educational settings Specification: Material: Metal, Glass Size Chart: 12.2cmx14.7cm/4.80inchx5.79inch Package Includes: 2 Pieces Foil Electroscope Note: Please allow slightly errors 1-2cm differences due to manual measurement.