Photo 1 of Hon&Guan 4" Air Filtration Kit: 4 Inch Inline Duct Fan with Speed Controller, 10" High Carbon Filter, 8 Ft Ducting & Rubber Coupler, Ventilation System for Grow Tents, Indoor Gardening, Hydroponics

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Photo 1 of Hon&Guan 4" Air Filtration Kit: 4 Inch Inline Duct Fan with Speed Controller, 10" High Carbon Filter, 8 Ft Ducting & Rubber Coupler, Ventilation System for Grow Tents, Indoor Gardening, HydroponicsPhoto 2 of Hon&Guan 4" Air Filtration Kit: 4 Inch Inline Duct Fan with Speed Controller, 10" High Carbon Filter, 8 Ft Ducting & Rubber Coupler, Ventilation System for Grow Tents, Indoor Gardening, Hydroponics