None Aluminum 4 in. Air tight pipe and dryer vent Hood

The 4 in. Aluminum Dryer Vent Hood, Pipe and Collar is suitable for venting a dryer or bathroom. This fireproof ventilation accessory is made from aluminum and features a positive-action vent closure that promotes optimum efficiency. Uses our proprietary Air Tight technology to reduce air leakage, improve appliance efficiency and reduce drying times.