Based on your location it seems like you might be looking for the Canadian site.
Would you like to continue, or switch to the Canadian site?
Ducts, Dampers, Adapters & Caps
Broan-NuTone® Wall Cap for 8-Inch Round Duct for Range Hoods and Bath Ventilation Fans
Maximize the air and sound performance of your Broan® ventilation fan or range hood using one of our wide variety of ducting accessories.