MARS HYDRO 6 Inch Refillable Carbon Filter, Inline Air Filter Odor Control with Australian Virgin Charcoal, Carbon Filter for Inline Fan, Grow Tent, Hydroponics, Pre-Filter Included, Reversible Flange Superior Activated Carbon Made of imported 1050+ Virgin Australian activated charcoal, delivering 100% filtered airflow, which provides better absorption and removes odor efficiently. Effective Odor Control The MARS HYDRO carbon filter is designed to use activated carbon to eliminate odors and chemicals. Ideal for controlling odor and purifying the air in grow tents/rooms, and can also absorb odors from pets and smoke. Multiple Functions The carbon filter can be used in conjunction with 6 inch inline fan to act as both intake and exhaust configuration. Ideal for eliminating some of the most undesirable odors for growing rooms, hydroponics rooms, indoor grow tents, and basements. Pre-Filter Cloth Heavy-duty construction contains aluminum ranges and dual-sided galvanized steel mesh. Includes a machine washable pre-filter cloth to prevent carbon residue. Carbon Filter Spec Dimensions: 6" Flange Ducting x 8.5" Length I Airflow Rating: 410 CFM. Package Included: 6 inch Carbon Filter×1, Pre-Filter ×1. (The belts are not included in the package.) Using Tips To achieve the best user experience, we recommend replacing the activated carbon every three months. Our carbon filters are designed for easy disassembly and carbon replacement.