The Norwegian Airfilters HEPA Filter is a high-quality flat panel filter with a diameter of 406mm and a true HEPA filtration technology. Made by Norwegian Airfilters, this filter is designed to capture allergens, fungal spores, PM 2.5, bacteria, and pollen, making it ideal for use in clean rooms and hospitals. With a filter frame material of galvanized steel and dimensions of 16 inches in height and width, this filter offers efficient and reliable filtration for a variety of applications.