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🔧 Seal the airflow, unlock comfort—neverest® keeps your space perfectly balanced!
The neverest® RK 4" Professional Backdraft Shutter Damper is a robust HVAC accessory crafted from galvanized steel and aluminum, designed exclusively for metal ducts. It features an automatic, smooth-operating flap with a noise-reducing foam strip, ensuring efficient prevention of unwanted air backflow across a wide temperature range (14-140°F). Easy to install and compatible with multiple ventilation systems, it’s a trusted choice for professionals seeking reliable airflow control and energy efficiency.




| ASIN | B011INHF5A |
| Best Sellers Rank | #79,523 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #124 in HVAC Ducting |
| Brand Name | neverest |
| Color | Silver |
| Connector Type | Flange |
| Customer Reviews | 4.5 4.5 out of 5 stars (2,075) |
| Exterior Finish | Aluminum |
| Item Dimensions | 22.44 x 20.47 x 15.75 inches |
| Item Weight | 140 g |
| Manufacturer | neverest |
| Manufacturer Part Number | 40545030039031 |
| Manufacturer Warranty Description | 2 years |
| Material Type | Galvanized Steel |
| Number of Packs | 1 |
| Number of Pieces | 1 |
| Size | 100 mm |
| Thread Type | CW |
| Unit Count | 1 Count |
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