Features: Convex Mirror/Concave Mirror/Triple Prism for choose, light refraction experiment is more convenient and clearer. Material: It is made of high transparent glass that will not hamper your view while using, very durable to use. Application: These mirrors is perfect for teaching light spectrum Physics. It is suitable for children to learn the optical knowledge. Size: Convex Mirror:Diameter with Holder:100mm/3.94in;Mirror Diameter:10cm/3.94in. Concave Mirror:Diameter with Holder:100mm/3.94in;Mirror Diameter:10cm/3.94in. Triple Prism:Edge Length:80mm/3.15in. Sales Service: We are committed to create the best product service for each customer. If this product does not meet your expectations, please feel free to contact us, we will try the best to deal with till you satisfied.Size :Concave Mirror Specification: Style(Optional): Convex Mirror:Diameter with Holder:100mm/3.94in;Mirror Diameter:10cm/3.94in. Concave Mirror:Diameter with Holder:100mm/3.94in;Mirror Diameter:10cm/3.94in Triple Prism:Edge Length:80mm/3.15in Component:Mirror/Frame/Pedestal Package List: 1*Convex Mirror/Concave Mirror/Triple Prism Note: Adults' guidance is needed for young children.