4" Backdraft Damper (403004)Made of galvanized steel. Prevents reverse air flow when fans are shut off. Saves CO2 and prevents odors from flowing backwards. Rubber gasket pre-installed on exterior for an air tight seal.
| ||Manufacturer's Product Information || |
|Dimensions||4 x 5 x 4|
Your Price $10.36 / each Estimate Shipping · Price Match
42.3% Off Suggested Retail Price
$17.95 You Save $7.59!
— Ships from Livermore, California USA