Features: 1Glass Material: Made of high quality optical glass material which will have a better performance than plastic or other materials, you'll also have a better visual experience. 2High Performance: High transparency leads to a high transmittance, good refraction is more gorgeous and clear, easier to feel the effect in the teaching process. 3Safe to Use: Well ground with fine workmanship, rounded edges and corners will not hurt hands, comfortable and safe for your using, no need to worry too much. 4Application Range: Widely used in instrumentation, image measuring instrument, projector, vision system, grinding tool word detection, automation equipment and other exact instruments. 5Package Content: The package contains only a triangular prism, other accessories and tools need to be prepared by yourself, please make sure you are clear about this. Package included: 1 x Prism 2 x Clamp 1 x Stand 1 x Chassis