Multi Function:Leaf electroscope is an essential tool for conducting electrical experiments and is ideal for teaching physics in primary and secondary schools Educational Science Instrument: Electric circuit experiment kit is designed for physical science experiments to help students understand the basic concepts of circuits Quality Material: Made of quality pp, this electromagnetism educational tool is lightweight and sturdy, and can withstand regular classroom use Compact size: The size of this physics science experiment is 4.1cmx4.5cmx2.5cm/1.61inchx1.77inchx0.98inch which is small and portable, making it easy for students to operate while still providing accurate reading during experiments Single Packaging: This electrical circuit learning case is packaged as a single unit, which can be easily into existing teaching kit or used alone for learning courses Specification: Material: PP Size Chart: 4.1cmx4.5cmx2.5cm/1.61inchx1.77inchx0.98inch Package Includes: 1 Leaf Electroscope Note: Please allow slightly errors due to manual measurement and different monitors.