Hon&Guan 4-inch backdraft damper with galvanized steel body, rubber-sealed valve wings, and spring-loaded airflow control.
Dimensions of Hon&Guan 4-inch backdraft damper with detailed measurements for HVAC and ducting systems.
Close-up of durable galvanized steel damper blades on Hon&Guan 4-inch backdraft damper, designed for efficient one-way airflow.
Enhanced HONGUAN 4-inch backdraft damper with reinforced inward pressure ribs and 0.6mm thick galvanized steel for improved durability and performance.
4-inch backdraft damper featuring a robust galvanized steel body, aluminum axis, and carbon steel spring for long-lasting durability and reliable performance.
Step-by-step installation of HONGUAN 4-inch backdraft damper into HVAC ducting for optimal airflow control.
Hon&Guan backdraft damper in use for bathroom fans, kitchen ventilation, and HVAC systems.

4 Inch Backdraft Damper, One-Way Airflow Duct Damper, Ducting Insert Backflow Preventer Duct Draft Blocker(2 pcs)

$20.99
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