The function of the waveguide window is to provide maximum RF attenuation while ensuring optimal airflow through the room. The materials of the waveguide window are tinplate, stainless steel, brass, copper and aluminum. The standard waveguide window size is 300mmx300mm, 300mmx600mm, 600mmx600mm thickness and aperture 1.6-8.2 for customer choice. At the same time, custom sizes can be provided.