Premium optical grade artificial crystal delivers superior light transmission from 0.20 to 5.50μm, making it perfect for various optical applications. Engineered with a parallel difference of less than 30 arcseconds, this mirror ensures exceptional precision and accuracy for both scientific and industrial use. Surface finish rated at 40/20-60/40 guarantees smooth and clear optical performance, ideal for high-end optical systems and demanding environments. Features protective beveling (0.2~0.5mm at 45°) to prevent damage during handling and installation, significantly enhancing durability and longevity. Versatile devise widely utilized in guidance systems and low temperature laboratory observation ports, making it an essential tool for professionals in precision optics.