Features: 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& 39;t take up space. Unique Features: Glass prisms are used in the appreciation of beautiful optics and the synthesis of experimental light during play.The glass prism adopts six-sided polishing process design, exquisite and beautiful, the same environment, different angles, will show completely different color performance. Quality Materials: The Square Cube Prism is made of high-quality optical glass, durable and clear, crystal clear and looks very pure,full of high-end and classic feeling. Perfect Gift: This optic prism cube is a great present for both children and adults on birthday or holidays like Christmas and Easter. After-sales Service:If you have any problem, please contact us immediately, we will help you solve it as soon as possible. Specification: Material:Optical Glass Size:1.27cm/1.5cm/1.8cm/2cm/2.3cm/2.5cm