Master Flow IR65BL Roof Louver, 5.88 in L, 18 in W, Resin, Black

High-impact resin. Scratch, crush and dent-resistant, with UV inhibitors to keep consistent color. 12% larger flashing with pre-drilled nail holes and a built-in screen to deter birds and rodents and prevent clogging. Slant back design to prevent weather infiltration especially in deep slope applications. Hood is snapped in place rather than tacked to reduce the chance of blow-off. 11-3/4 in x 10-3/4 in opening, 20-1/4 in x 18 in flashing, 5-7/8 in H. 65 sq-in of net-free ventilating area. CSA listed.