Description: 【DIY Physics Kits】: This physics experiment pendulum ball set can enhance children's interest in physics, strengthen their understanding of physics, and improve their hands on and thinking skills 【Educational Tools】: This pendulum experiment equipment is a teaching aid for elementary school mathematics and physics classes, providing a hand on learning experience that can help students better understand abstract concepts in a concrete way 【Quality Material】: The handheld pendulum ball kits is made of iron, ensuring its durability and lifespan 【Product size】: The base size is 16cmx9.5cm and 40cm high, which is compact enough for easy storage, but large enough for practical use 【Package Included】: The package contains a set of single pendulum ball and stand and stand physics experiment set and iron stand , which is very suitable for personal use or as part of classroom teaching Specification: Material: Iron Size Chart: Base: 16cmx9.5cm/6.30inchx3.74inch Height: 40cm/15.75inch Package Includes: 1 Physics Experiment Pendulum Ball Set Note: Please allow slightly errors 1-2cm differences due to manual measurement.