This is the WGW2516-AV2, a rectangular window with dimensions of 15 x 25 mm and a thickness of 1 mm. It is made of soda lime ru clear, a popular material for optical elements due to its excellent clarity and durability. The window features an anti-reflective (AR) coating on both the front and back surfaces, specifically designed for the extended visible spectrum of 450-900nm. This coating enhances the window's performance by reducing unwanted reflections and increasing transmission, making it ideal for applications that require high light transmission and clarity. The window is designed in a flat configuration, ensuring a uniform and distortion-free view. It is sourced from Knight Optical, a reputable vendor known for its high-quality optical components. The window is currently in stock and can be purchased directly from the vendor's website.