ITEM NAME:2 Inch Physics Teaching Precision Optical Glass Prism B9O3 2 Inch Physics Teaching Precision Optical Glass Prism B9O3 This kind of optical glass prism can reflect seven-color sunlight It can be used to teach children to explore the mysteries of light, stimulate a child's thirst for knowledge Improve the children's interest of understanding the magic world Can be also a toy for kids Not suitable for children under 5 years. For use under adult supervision. 6 Inch Physics Teaching Precision Optical Glass Prism Package Content: 1 x Prism，1 x red case Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.
