SPECIFICATIONS EAVE VENT #EV145-1/8 Galvanized Steel · N.F.V.: 44 sq. in • 1/8 in. mesh • Rough Opening: 14 ¾ in. x 4 ¾ in. • Stucco Flange 14 ½ in. 36.83 cm 4 ½ in. 11.