Roof Louvers are a type of attic exhaust vent that make up half of a balanced attic ventilation system for each roof. Intake vents make up the other half of the system. Together they help remove any built-up heat and moisture inside the attic for year-round ventilation.. Color Family: Black. Color/Finish: Black. Features: UV Resistant. Intake/Exhaust: Exhaust. Material: Galvanized Steel. Mounting Position: Roof Mount. Pack Size: 1. Paintable/Stainable: No. Power Type: Non-Powered. Product Weight (lb.): 3.7 lb. Returnable: 90-Day. Screen Included: No. Shape: Square. UV Resistant: Yes. Cut-Out Width (in.): 8 in. Net-Free Area (Sq. In.): 50. Product Depth (in.): 20.40 in. Product Height (in.): 5.20 in. Product Width (in.): 15.85 in. Net-Free Area (Sq. In.): 50. Intake/Exhaust: Exhaust. Features: UV Resistant