Feature: 1. High quality Material: Made of premium quality glass with durability and smooth surface, which allows it to be used for long time with fading and deforming. 2. Beautiful Design: The glass pyramid can creat rainbow in the sunlight, and its special pyramid design allows it to be a beautiful decoration. 3. Multiple Functions: This color cube can be applied for optical experiments, home decoration and educational teaching, especially for physics. 4. For Photography: It can create different beautiful colors through beam splitting and light refraction, which is a wonderful addition to your photography. 5. Lightweight and Portable: The length is 60mm, package weights 178g, which is easy to use and carry. And it is suitable both adults and children. Specification: Features: High quality Material: Made of premium quality glass with durability and smooth surface, which allows it to be used for long time with fading and deforming. Beautiful Design: The glass pyramid can creat rainbow in the sunlight, and its special pyramid design allows it to be a beautiful decoration. Multiple Functions: This color cube can be applied for optical experiments, home decoration and educational teaching, especially for physics. For Photography: It can create different beautiful colors through beam splitting and light refraction, which is a wonderful addition to your photography. Lightweight and Portable: The length is 60mm, package weights 178g, which is easy to use and carry. And it is suitable both adults and children. Specifications: Material: Glass Item Size: 60mm / 2.4in Package Size: 17.5 * 11.5 * 9.5cm / 6.9 * 4.5 * 3.7in Package Weight: 178g / 6.3oz Package List: 1 * Pyramid Prism Package List: 1 * Pyramid Prism