Material: This product is made of pp, ensuring durability and longevity. Size: The transparent box that houses the product measures 8.5cmx4cmx9cm, making it compact and easy to store. Package Contents: The package includes 1 piece of Friction Electricity Physics Experiment Electrostatic Meters, ideal for teachers' use in educational settings. Educational Tool: This foil electroscope is for demonstrating the principles of electrostatics in a classroom setting or at home for educational purposes. Quantity: Each package comes with 1 piece device, providing great value for educators needing multiple sets for their physics experiments. Specification: Material: Pp Size Chart: 5cmx6cmx2.5cm/1.97inchx2.36inchx0.98inch Package Includes: 1xLeaf Electroscope Note: Please allow slightly errors due to manual measurement and different monitors.