12" X 30" or 30" X 12" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 13.75 X 31.75] sidewall 75"H – fits a 16"

75"H – fits a 16" X 4" duct opening

with actual front end outer dimensions of 7"

Applications – The flat transition duct 45-degree elbows are used for changing the vertical direction of the rectangular duct

Applications – The galvanized steel round duct is used to cut into a plenum or rectangular duct to begin a trunk line or branch-like runs

no exceptions

12" X 30" or 30" X 12" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 13.75 X 31.75] sidewall 75"H – fits a 16"+ Product Details Size 12"w X 30"h or 30" x 12" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 75" width X 31. 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