Active Air HAF4 Flange Dual Kit, 4"

Hydrofarm Active Air HAF6 Flange Dual Kit, 6"

POWERTEC 70126 Inlet Flange, 4-Inch

iPower GLDUCT4X8C 4 inch 8 feet Non-Insulated Flex Air Aluminum Foil Ducting Dryer Vent Hose for HVAC Ventilation with 2 Clamps

Hydrofarm Active Air Stainless Steel Duct Clamps, 4" (Pack of 2)

AC Infinity Flexible 4-Inch Aluminum Ducting, Heavy-Duty Four-Layer Protection, 25-Feet Long for Heating Cooling Ventilation and Exhaust

AC Infinity CLOUDLINE S6, Quiet 6” Inline Duct Fan with Speed Controller - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics

HG POWER ABS Quality Straight Pipe Flange Ventilation Ducting Connector (6inch)

iPower GLFANXCONTROL Exhaust Variable Speed Adjuster for Duct Inline Fan Vent Blower, HVAC Controls, 350W, Black

VIVOSUN 4 Inch Air Carbon Filter Odor Control with Australia Virgin Charcoal for Inline Fan, Grow Tent Odor Scrubber, Pre-Filter Included, Reversible Flange 4" x 14"