Prism Length: approx. 2 inches This kind of optical glass prism can reflect sunlight in seven colors. It can be used to teach children to explore the mysteries of light, to stimulate a child's thirst for knowledge, and improve the interest to understand the magical world for children. details: good prism for teaching Perhaps as a toy for children Made of high quality optical glass Prism Length: approx. 2 inches The package includes: 1 x prism
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