Duraflo 6050BL Roof Vent, 16.904 in OAW, 50 sq-in Net Free Ventilating Area, Polypropylene, Black

Low profile style. Molded in screen. Angled screen that prevents birds from nesting. Wide, flexible flange will not crack on installation, even in cold weather. Angled throat to effectively deflect water. Injection molded UV resistant polypropylene.