Made of durable optical glass, the Square Cube Prism features excellent refraction and clear reflection. Its unique craftsmanship and small size allow for beautiful color performances from different angles, making it perfect for photography. The prism is not only a decorative item but also a teaching tool for light spectrum physics. With its portable design and the ability to create good filter effects, it is an ideal gift for children to learn about the physics spectrum. Features 1. Materials: The Square Cube Prism is made of excellent optical glass, durable and clear, Textured, with better refraction and clear reflection. 2. Unique Craftsmanship: The glass prism adopts six-sided polishing process design, exquisite and beautiful, the same environment, different angles, will show completely different color performances. 3. Portable Design: The glass prism is small size , so you can easily hold it in front of the camera lens and take special photos. Take it with you and don't take up space. 4. Features:Glass prisms are used in the appreciation of beautiful optics and the synthesis of experimental light during play. They are used to split the light beam into different spectral components which are displayed in rainbow colors. 5. Widely Application: The glass prisms can be used for teaching light spectrum physics or research tools, and can also be used for decoration and photography, which can produce good filter effects. Creative gift for children for physics spectrum learning. Specification Material: Glass Color: Multicolor Size: 7 x 7 mm, 10 x 10 mm, 12.7 x 12.7 mm, 18 x 18 mm, 23 x 23 mm, 25 x 25 mm Weight: 17 g, 22 g, 27 g, 32 g, 37 g Package Include: 1x Cubes