Kiln Viewing Peep Hole Blue Glass is a specialised heat-resistant viewing glass designed to provide safe observation of high-temperature furnaces, kilns and industrial heating equipment. Manufactured from premium cobalt blue heat-resistant glass, it effectively filters intense infrared and visible light, allowing operators to inspect furnace operations while reducing eye strain and glare. Its durable construction withstands demanding industrial environments and prolonged exposure to elevated temperatures. Suitable for steel plants, foundries, glass manufacturing units, ceramic industries, heat treatment facilities and industrial furnaces, this viewing glass enhances operator safety while ensuring accurate monitoring of high-temperature processes.