Prism Optical Glass Pyramid 40mm Height Rectangular Pyramid Polyhedral Popularization of Science Studying Home Students Phylics Color: transparent Material: K9 glass Great value collections and gifts Height: 40 mm Package Contents: 1 x pyramid prism Only the above package content, other products are not included. Note: Light 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.