Air Vent MRV20 is a versatile ventilation product designed to enhance airflow and prevent moisture buildup in your home's attic. It features a 2-inch wide slot that allows for proper air circulation along the roof ridge, helping to reduce heat and humidity. The product is easy to install and can be used with shingle roofs. Ridge shingles can be installed directly over the MRV20, providing both ventilation and a finished look to your roof.