GAF COBRA CRV3 Exhaust Vent, 4 ft L, Polypropylene, Black

COBRA� Rigid Vent 3" exhaust vent for roof ridge allows heat and moisture to escape at the ridge. It provides 18 sq-in per ft of net-free ventilating area and its unique EasyTear" sizing feature allows you to hand-tear product in 3 in increments - no knives necessary and less waste.