Features: This set of physics optics experiment props widely used for teaching physics, refracted light, creating spectrums, creating rainbows for photography. Package contains: 6Pieces Acrylics Optical Lens, 1Piece 3 Way Lighting Device, 1Piece Semicircle Case, 1Piece Triangled Case, 1Piece Refract Device. Crafted from acrylics, light in weight, not easy to break or deformed, good durability, for long time use. 6 different optical lens physics teaching aid: Triangular Lens, Semicircular Lens, Rectangle Lens, Biconvex Lens, biconcave Light Lens. Meet the requirements of different experiments. Help children learn the physical optics of refraction and reflection knowledge in easy way. Suitable for students and teachers to use in the demonstration of optical experiments, classroom, labs. Specifications: Color: Clear Component: Acrylics Package Case Size: Approximately. 24x11cm/9.45x4.33in Weight: Approximately. 180g Package Includes: 1Set Physics Optical Lens Experiment Set note: 1.Please allow 0-1cm error due to manual measurement. Be sure you donot mind before bid. 2.Due to difference between different monitors, the picture may not reflect the actual color