Precision-crafted triangular prism made from premium BK-7 optical glass, ensuring excellent light transmission and minimal optical distortion. Dimensions: 20mm x 20mm x 20mm, devised to deflect light at a 90° angle, ideal for various optical applications. Exceptional resistance to mild chemicals and U-V radiation, making it suitable for outdoor and laboratory use. High surface accuracy and precision with ±0.1mm shape tolerance and ±3' angle error for reliable performance in experiments. Versatile use in optics, including lenses, windows, and other optical elements, perfect for educational and professional environments.