This ULO Optics window is a high-quality product designed for use in various business and industrial applications. The window is made from ZnSe and has a flat D shape with a diameter of 8.0mm and a thickness of 6.0mm. It also features an AR/AR coating that provides excellent anti-reflexion properties, making it an ideal choice for use in optical systems. The brand of this window is ULO Optics, a trusted name in the industry. This product is suitable for use in a range of applications, including window sensors, antenna tuners, and laser printers. It is easy to install and use, and its durable construction ensures long-lasting performance. If you're looking for a reliable and high-quality window for your business or industrial needs, this ULO Optics ZnSe window is an excellent choice.