18" X 18" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 19.75 X 19.75] Material_Steel at predicted low air motion

at predicted low air motion 35 fpm in the zone of occupancy

+ Product Details Size & Compatibility – The galvanized sheet metal oval stack head is compatible with Duct 6"

plus { background-color: #5296DD

+ Product Details Size - 14"w X 14"h is the size for the duct opening measurement only

18" X 18" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 19.75 X 19.75] Material_Steel at predicted low air motion+ Product Details Size 18"w X 18"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 75" width X 19. 75" height. High Quality High grade steel construction meant for high foot traffic areas. Installation Location Floor. Design Easy drop in installation. Powder Coat Finish Smooth, shiny, scratch resistant, with no sharp edges. Looks like it was just waxed. Quality Packaging Carefully shrink