Educational Tool: Physical Light Reflection and Refraction Model is designed to clearly demonstrate the phenomenon that light changes its direction of propagation when it moves from 1 medium to another, causes refraction at the of different media, and the phenomenon that light returns to its direction in materials when it reaches different substances Material: Physical Light Reflection and Refraction Science Kits is made of pp, ensuring long life and regular use in classroom or environments Size: Physics Optics Experiment Set is packaged with a product size of 53cmx14cmx12cm, which is small and easy to store or transport Comprehensive Set: The package contains a full set of equipment required to conduct various optical experiments Ideal for Middle School Students: Teaching Aid is suitable for students studying science in middle school, providing them with practical experience in physical experiments related to optics Size Chart: Packing size: 53cmx14cmx12cm/20.87inchx5.51inchx4.72inch Package Includes: 1 Physics Optics Experiment Set