Premium diffuse reflection glass with a diameter of 20mm and thickness of 2mm, devised for optimal light diffusion in various applications. Manufactured using base materials, ensuring excellent surface accuracy and durability for reliable performance. Features a thickness tolerance of ±0.05mm, providing high precision and consistency for laboratory and optical experiments. More than 90% effective aperture, making it ideal for enhancing light transmission and reducing glare in optical setups. Perfect for use in test tubes and other laboratory equipment, suitable for scientific research, photography, and various optical applications.