646015 WHT SOFFITT EXHAUST VENT | No need to penetrate the roof or wall. For venting bathrooms or dryers. Flapper lets out hot moist air while keeping out cold air. Mounts flush to soffit for virtually invisible installation. Meets CSA codes and standards. Connects to either 4 in or 5 in ducting or flex hose. Overall size 6-3/4 in x 5-3/4 in.