AC Infinity Refillable Activated Carbon Filter Set 150mm - with Activated Carbon Refill Pack, for odor elimination in inline fans and ventilation ducts in grow tents and hydroponics.

["Reusable carbon filter features a patented design that does not require complete filter replacement.","Includes 1+ refill pack to match the filtration capacity of two standard carbon filters with 6-inch diameter while costing less.","Removable twist-off flanges support easy, tool-less refilling through the included funnel and scoop.","The larger chamber has been lab-tested to effectively block odors like standard filters without requiring compression.","Dual-layered steel mesh with protective coating withstands high humidity in grow tents through multiple growth cycles."]