AC Infinity Duct Carbon Filter - Australian Charcoal - 6

The high-airflow duct filter is designed to use activated carbon to eliminate odors and chemicals, popularly used for hydroponics, grow rooms, kitchens, smoking areas, and other ventilation projects. Features premium-grade Australian Virgin charcoal bed. The filter can be used in conjunction with an inline duct fan to act as both intake and exhaust configuration. Heavy-duty construction contains aluminum flanges and dual-sided galvanized steel mesh.

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Anyone know when these will be back in stock? Or does anyone know of a cheap alternative to these? I don't have the money to spend on a whole air filter system

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Reusable carbon filter features a patented design that eliminates the need to replace entire filters. Includes 1+ refill to match the filtration capacity of two standard 6” carbon filters while costing less. Removable twist-off flanges support easy, tool-free refilling using the included funnel and scoop. Larger chamber is lab-tested to block odors as effectively as standard filters with no compression required.

AC Infinity, Refillable 6 Carbon Filter Kit