Features: This set of physics optics experiment props widely used for teaching physics, refracted light, creating spectrums, creating rainbows for photography. Package contains: 6Pieces Acrylic Optical Lens. Crafted from quality acrylic, light in weight, not easy to break or deformed, good durability, for long time use. 6 different optical lens physics teaching aids: Prism, 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 Size: Approximately. 22.5x10cm/8.86x3.94in Weight: Approximately. Package Includes: 6Pieces Optical Lens 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