Brand New GAF Cobra Exhaust Vent 8 in. x 20 ft. Black Plastic Mesh Roll Ridge Vent (Nail Gun Version) About This Product A properly balanced attic ventilation system is critical for a long-lasting roof. Effective attic ventilation will help to remove excess heat and moisture to protect your roof from premature deterioration. This product can aid in the prevention of roof rot in your attic or roof deck and help minimize peeling, extending the life of your exterior and interior paint. The Cobra roll is low profile, which makes it almost invisible when installed. Superior protection: helps to prevent wood rot and extends the life of your exterior paint Energy efficient: may even reduce energy bills Easy to install: quick 3-step process 100% shingle-over design is virtually invisible when installed