Constructed from premium BK-7 optical glass, ensuring high transmittance in near ultraviolet, visible, and near infrared wavelengths. Features a precise 20x20x20mm size, with a shape tolerance of ±0.1mm and an angle error of ±3', perfect for accurate optical applications. devised to deflect light by 90°, making it ideal for various optical setups, including lenses, prisms, and windows. Excellent resistance to mild chemicals and U-V radiation, ensuring durability and longevity in exposed environments. Versatile use in scientific experiments, educational demonstrations, and optical equipment, suitable for both professionals and enthusiasts.