4 Inch Carbon Filter for Grow Tent, Air Carbon Filter with Premium Australia Virgin Charcoal for Grow Tent Fan, Grow Tents, Air Filtration, Hydroponics

Spider Farmer 4 Inch Air Carbon Filrer Smelliness Control with Premium Australia Virgin Charcoal for Inline Duct Fan, Grow Tent Odor Control, Hydroponics, Pre-Filter Included, Reversible Flange

Spider Farmer 4 Inch Inline Duct Fan with RJ12 Interface, 205 CFM Quiet EC Motor, Ventilation Exhaust Fan with Speed Controller for Heating Cooling Booster, Grow Tents, Hydroponics

AC Infinity Flexible 4-Inch Aluminum Ducting, Heavy-Duty Four-Layer Protection, 8-Feet Long for Heating Cooling Ventilation and Exhaust