Owens Corning Raft-R-Mate Attic Rafter Vent is designed to create a balanced ventilation system in your attic by allowing fresh air to flow ly from the soffit vents up between the rafters to the ridge vents. This vent prevents insulation from blocking airflow by creating a clear space between each rafter, ensuring continuous ventilation that helps maintain comfort throughout all seasons and protects your roof from damage. Made from durable extruded polystyrene foam, these vents resist rotting and deterioration, while their lightweight rigidity and excellent break-resistance make installation easy. They fit 24-inch rafters and can be snapped in half to accommodate 16-inch or 12-inch rafter spacing. Each vent measures 48 inches long, providing effective and reliable attic ventilation. Model Number: