Product: Elementary school mathematics teaching aid pendulum experiment device, suitable for enhancing your students' understanding of physics concepts.Material: Simple Pendulum Experiment Device is made of iron material, which is durable and sturdy, ensuring its durability and longevity.Product Dimensions: The Physics Experiment Device measures 11.5cmx9cmx44cm, making it compact enough for easy storage and transport but large enough for clear visibility during demonstrations.DIY Physics Kits: The Simple Pendulum Experiment Setet can improve kid's interest in physics, strengthen children's knowledge of physical, and improve their hands-on and thinking skills.Educational Tool: This device is an teaching aid for elementary school mathematics and physics lessons, providing a hands-on learning experience that can help students better understand abstract concepts in a concrete way. Specification: Material: Iron Size Chart: 11.5cmx9cmx44cm/4.53inchx3.54inchx17.32inch Package Includes: 1 PieceSimple Pendulum Experiment Device Note: Please allow slightly errors due to manual measurement and different monitors.