iPower4 Inch 195 CFM Inline Duct Ventilation Fan Air Circulation Vent Blower with Variable Speed Controller for Hydroponics Grow Tent, 4', Black

iPower 4 Inch 195 CFM Inline Duct Ventilation Fan Air Circulation Vent Blower with Variable Speed Controller for Hydroponics Grow Tent, Black

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

Abuff 4-inch Duct Connector, 2 Pack Plastic Straight Pipe Flanges, Ventilation Ducting Connector for Heating Cooling Ventilation System