When installed as part of a properly balanced attic ventilation system, GAF Cobra Exhaust Vent is a shingle-over exhaust vent installed at the roof ridge that helps exhaust excess heat and moisture from your attic. It comes on an easy-to-install flexible mesh roll and is hand nailable with no complicated fitting, wrapping, nail gun adapters, connectors, or end-plugs needed. Help protect your roof system from premature deterioration by installing a properly balanced attic ventilation system consisting of Cobra Exhaust Vent at the ridge and adequate intake ventilation at or near the soffit areas of your roof. Color: Black.