[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 Specifications: Material:Iron Size: Base:16cmx9.5cm/6.30inch x 3.74inch Height:40cm/15.75inch Note: Please allow slightly errors 1-2cm differences due to manual measurement. Package included: 1 Physics Experiment Pendulum Ball Set