16" X 24" or 24" X 16" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 17.75 X 25.75] Compatible With Duct 4in + Product Details Size –

+ Product Details Size – 14"w X 18"h is the size for the duct opening measurement only

+ Product Details Size – 28"w X 24"h is the size for the duct opening measurement only

Easy Installation – Just pop the diffuser right into the wall duct hole and the side springs will hold it right into place so that it looks clean

+ Product Details Size - 16"w X 22"h is the size for the duct opening measurement only

+ Product Details Size – 14"w X 25"h is the size for the duct opening measurement only

16" X 24" or 24" X 16" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 17.75 X 25.75] Compatible With Duct 4in + Product Details Size –+ Product Details Size 16"w X 24"h or 24" X 16" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 75" width X 25. 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