The cube optical prisms are made of , which have the . Features the compact size, which is easy to use, store and carry. It can reflect the rainbow light under the sunlight. It is essential equipment for optical science studying. Features -Color: As Shown. -Material: Mirror. -Size 1: About 1.50X1.50X1.50cm/0.59X0.59X0.59inch -Size 2: About 2.00X2.00X2.00cm/0.79X0.79X0.79inch. -It is made of good material, excellent and practical, which can withstand the long-term use. -It comes with the compact size, portable and very handy to use, bring much convenience to you. -It is a meaningful gift for children to learn more about the physics , educational and practical. -Wonderful workmanship and excellent detail will the clear imaging function, useful optical experimental instrument. -It can clearly reflect the rainbow light under the sunlight, good and wonderful refraction effect. Package list: 2 x cube prisms