Upgrade your home's ventilation system with our easy-to-install roof vent cap, designed specifically for use with bath ventilation fans. This durable, low-profile cap helps effectively remove excess humidity from the exhaust area, preventing moisture-related damage and weather-induced deterioration. Featuring an advanced anti-gust damper system, it prevents the back-flow of exhaust air, ensuring optimal ventilation performance. The included plastic screen helps block birds and rodents from entering, offering additional protection. Ideal for use with both 4-inch and 6-inch round ducts, this vent cap can also be used in clothes dryer applications when the screen is removed. Constructed from high-quality polystyrene, it's built to last and blends seamlessly with your home's exterior.