Promoting energy efficiency while also helping to prevent roof system rot and mildew growth, Cobra® IntakePro™ rolls out and fastens with included 1 ¾ in. coil nails. Product can also improve attic ventilation airflow by up to 20% when installed with existing soffit/undereave vents in properly balanced ventilation system, and there is no need for alterations at soffit. Designed for versatility and durability, vent withstands wind-driven rain, snow, and ice-dam infiltration.