Metal air filters, such as stainless steel filters, galvanized steel filters, and aluminum filters, come in mesh or baffle filter style. These filters are typically installed as kitchen range hood filters. They attract and hold grease, are washable and, when used as pre-filters, protect against large particulate entering the more delicate aspects of the filtering or ventilation system. Products vary by composition, dimension, air flow (FPM) and other considerations. For more on filters, see our air cleaner filters and carbon filters.