The air carbon filter is designed with high-quality Australian granular activated carbon to provide you with excellent carbon porosity, it is not only suitable for odor control and purification of the air in the grow tent/room, but also can absorb odors produced by pets, smoke, cooking fumes, so that you can get clean and fresh air. Product name: Air carbon filter smelliness control Product material: activated carbon, galvanized steel wire. Size: 4'' flange duct x 11'' length. Product color: silver. Package Included: 4'' Carbon Filter × 1, Pre-Filter × 1. Features: 1. The carbon filter for grow tent has premium Australian virgin charcoal bed, rated at 1200+ IAV, providing 100% filtered airflow. 38mm thick charcoal bed ensures higher absorption rate and longer service life. 2. Insulated flange, honeycomb structure, galvanized steel mesh, conical inner base. Reusable carbon filter, no need to replace the entire filter, saving time and cost. 3. Carbon filter odor control can be used as an intake or exhaust filter in various settings, such as inline fans and duct fans, intake and exhaust fans, air exchange fans, ventilation duct systems.