AC Infinity Duct Carbon Filter, Australian Charcoal, 8-InchDescription 8 Inline Filter: This filter is custom made to prevent odors and harmful chemicals from escaping rooms where plants are grown. It features premium grade Australian charcoal for better adsorption and durability. Durable Construction: The filter boasts a powder coated gunmetal finish constructed for high durability and resistance to high humidity levels. It is furnished with aluminium flanges and galvanized steel mesh. The package also