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4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector

4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector

4.5 out of 5 stars (1,369 ratings), 400+ bought in past month

$9.99$11.9917% off

Price as of Nov 5, 1:51 AM UTC

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4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting is $9.99 at Amazon, 17% off the usual $11.99. Listed as of Nov 5, 1:51 AM UTC.

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