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air vent deflectorBackdraft Damper HVAC Inline Fan Vent Deflector（One-Way Airflow Ducting Insert Backflow Preventer Duct Draft Blocker）
Backdraft Damper HVAC Inline Fan Vent Deflector（One-Way Airflow Ducting Insert Backflow Preventer Duct Draft Blocker）
From $8.95
flap shutterflap shutter
Double Flaps Back Draught Shutter 150mm to 180mm
$11.95
snap on straight edgeDucting Connector
3 Inch Ducting Connector With Straight Snap-on
$6.95
back draught shutterback draught shutter
Draft Blocker Backdraft Damper Back Draught Shutter
From $4.95
connectors adaptersconnectors adapters
T Shape Duct Connector Adapter 3 Ways Splitter
From $7.95
3 way splitter3 way splitter
Y Shape Duct Connector Adapter 3 Ways Splitter
From $8.95
duct increaser/reducerduct increaser/reducer
Duct Adapter PVC Reducer, Duct Increaser/Reducer for Grow Tent HVAC Ventilation System
From $2.95
4 Inch Rubber Coupler Connector Noise Reduction Clamp for HVAC Inline Duct Fans & Carbon Filters4 Inch Rubber Coupler Connector Noise Reduction Clamp for HVAC Inline Duct Fans & Carbon Filters
4 Inch Rubber Coupler Connector Noise Reduction Clamp for HVAC Inline Duct Fans & Carbon Filters
$6.99
6 to 4 Black Metal Reducer Increaser for 4/6 Inch Ducting6 to 4 Black Metal Reducer Increaser for 4/6 Inch Ducting
6 to 4 Black Metal Reducer Increaser for 4/6 Inch Ducting
$9.99
8 to 6 Black Metal Reducer Increaser for 6/8 Inch Ducting8 to 6 Black Metal Reducer Increaser for 6/8 Inch Ducting
8 to 6 Black Metal Reducer Increaser for 6/8 Inch Ducting
$11.99