This product is a 118x118x11mm Inspection Window made out of polycarbonate, manufactured by Roztocze (part number 4.423.004). This window is designed to provide visual access and inspection to machinery or industrial equipment without the need to remove or dismantle the cover or case. This window is tough, scratch-resistant, and shatterproof and is designed for applications such as electronic instrument enclosures, lighting, and more. It is also lightweight yet durable for long-term use.