Broan-NuTone 6.5 in. W X 6.5 in. L White Resin Wall Ducting Kit

This Broan Wall Vent Ducting Kit is the perfect easy to install vent for a kitchen or bath ventilation fan. It will work with 3 inch or 4 inch ductwork and includes a 3 inch to 4 inch adapter for convenience. The flexible ducting conforms to UL 181 Class 1 air connector requirements.