Aluminum material resists rust. Fully enclosed hood to help prevent rodent/insect infiltration and leaf/pine needle clogging. Embossed finish hides scratches and resists wear. Larger flashing with pre-drilled nail holes makes installation easier, helps prevent leaks. 9-7/8 in opening, 16 in x 201/2 flashing dimension. 60 sq-in. of net-free ventilating area per vent. Dade County approved. Florida Building Code (FBC) approved for specified Sku's. CSA listed.
