VIVOSUN 4 Inch Air Carbon Filter Odor Control with Australia Virgin Charcoal for Inline Fan, Pre-filter Included, Reversible Flange 4" x 14" SUPERIOR CARBON QUALITY: Made of imported Virgin Australian activated charcoal, delivering 100% filtered airflow. 1050+ RC 48 carbon captures three times more air contaminants than average due to optimal surface area per carbon particle. ELIMINATES ODOR AND CHEMICAL IRRITANTS: Protects from chemical irritants and eliminates odors- from pungent indoor grow operations to bathrooms, basements and kitchens. Absorbs odors from pets and smoking as well. EFFECTIVE ODOR CONTROL: Eliminate some of the most undesirable odors, pungent smell and particulates from indoor grow tent, hydroponics grow room. VERSATILE APPLICATIONS: Item can be used as intake or exhaust filter in a variety of setups including use with 6 inch inline fan and duct fans, intake and exhaust fans, air exchange fans, ventilation ducts, and other accessories. PACKAGE INCLUDES: Carbon Filter; Changeable Velcro Pre-filter; Carbon Filter Belts. Dimensions: 4'' x 14'' Grow tents, cupboards and cabinets. Anywhere without a roof/ceiling cavity to displace extracted air into. Air-cooled lighting. Lower-level floors of double/triple story houses. Window to window ventilation applications. Hot or cold &#034;filtered air transfer&#034; from one air conditioned room to another.