431 Broan - Fan Accessories 3 1/4 x 10 Inch Duct with Backdraft Damper -
- Maximize the air and sound performance of your Broan ventilation fan or hood by using one of our wide variety of ducting accessories specifically designed for Broan ventilation products.
- For 3 1/4" X 10" duct
- Includes backdraft damper and grille
- Only recommended for fans with more than 160 CFM