Description This product is designed for demonstrating the principles of thermal expansion and contraction using various materials such as copper and plastic balls. It is an ideal tool for elementary science experiments, allowing students to observe how different materials react to temperature changes. The set is great for hands-on learning in a classroom setting. Features -Color:Assorted Color -Material:copper, plastic -Size:14.50X0.70X0.70cm/5.70X0.28X0.28in -Material variety: choose from copper and plastic balls to meet diverse experimental needs -Thermal expansion experiment: helps students understand the principles of thermal expansion and contraction -Elementary science material: ideal for elementary school science experiments and curriculum -Versatile Application: Suitable for various educational levels, from middle school to college physics courses -Durable materials: longlasting and reusable for multiple experimentsPackage list: 1 x Thermal Expansion Experiment stand 1 x Plastic ball 1 x Copper ball