18 In.H 16 In.W Non-Drnbl GSteel Intake Louver, Louver Type Stationary Blade, Frame Type Flanged, Frame Depth 4 in, Mounting Style Surface Mount, Outside Height 18 in, Outside Width 16 in, Rough Opening Height 14 in, Rough Opening Width 12 in,...
18 In.H 16 In.W Non-Drnbl GSteel Intake Louver, Louver Type Stationary Blade, Frame Type Flanged, Frame Depth 4 in, Mounting Style Surface Mount, Outside Height 18 in, Outside Width 16 in, Rough Opening Height 14 in, Rough Opening Width 12 in,...