iPower 4 Inch Key Adjustable Stainless Steel Vent Vacuum-and-Dust-Collector-Hose-Clamps, 5 Pack, Green

POWERTEC 70111 Heavy Duty 4-Inch x 10-Foot PVC Flexible Dust Collection Hose, Clear Color

Lambro 244 Duct Connector

iPower 4 Inch 8 Feet Non-Insulated Flex Air Aluminum Ducting Dryer Vent Hose for HVAC Ventilation, 2 Clamps included

Hydrofarm Y Connector, 4 by 4 by 4-Inch

POWERTEC 70126 Inlet Flange, 4-Inch

iPower 4 Inch Air Carbon Filter Odor Control Scrubber with Australia Virgin Charcoal for Inline Fan, Reversible Flange, Prefilter Included

POWERTEC 70136 4-Inch to 2-1/2-Inch Cone Reducer

Fantech 9800000 RSK-4 Backdraft Damper, 4" Duct

iPower GLFANXINLINE4 HVAC Blower, Inline Fan, Grey

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