![[Upgraded]4” Backdraft Damper One-Way Airflow Vent Duct Draft Blocker Galvanized](/image/tFMAAeSwjl1pITYE/upgraded-4-backdraft-damper-one-way-airflow-vent-duct-draft-blocker-galvanized.jpg)
| Size Name | 4 Inch |
|---|---|
| Brand | Unbranded |
| Type | Ducting |
| Color | Sliver |
| Material | Galvanized Steel |
Check the listing for details. [Upgraded]4” Backdraft Damper One-Way Airflow Vent Duct Draft Blocker Galvanized. Color: Sliver, Condition: New. Listed at 16.99 USD. 【Material】The backdraft damper and the flap leaves is made of a galvanized steel, the axis are made of aluminum, while the spring are made of carbon steel. 【Wide applications】Back draught valves can be inserted into ventilation ducts which are flexible or non-flexible.
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