4" X 16" or 16" x 4" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 5.75 X 17.75] w20h20 Actual Filter Size – 31

Actual Filter Size – 31 3/4"w x 27 3/4" x 1"

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actual front end outer dimensions are approximately 32 5/8" width X 12 5/8" height -

+ Product Details Size & Compatibility – The size of sheet metal pipe is 10" round x 48" long

4" X 16" or 16" x 4" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 5.75 X 17.75] w20h20 Actual Filter Size – 31+ Product Details Size 4"w X 16"h or 16" x 4" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 5. 75" width X 17. 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