Unlike Baffle filter, Honeycomb grease filters are made from high quality acid resistant alumi-num throughout. The filter media is made from 50mm wide aluminum foil, which is specially corrugated into a herringbone shaped channel. This foil when placed one on top of the other will form a curved honeycomb channel. When the incoming grease laden air passes through this media, the air changes direction. The resul-tant change in inertia causes the grease to cling and condense onto the aluminum surface. This prevents grease form entering the exhaust sys-tem.