4" X 10" or 10" X 4" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 5.75 X 11.75] Brown + Product Details Size -

+ Product Details Size - 12"w X 18"h X 2"d (for duct opening measurement only)

+ Product Spec Sheet Aluminum Return Filter Grille Spec Sheet

+ Product Details Size – 3" round duct sheet metal elbow - 30 gauge galvanized - crimped end connection - adjustable from 5° - 90°

our galvanized steel round duct is the ideal choice

The total outer size of this grille is the listed size plus 2 and 5/85"

4" X 10" or 10" X 4" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 5.75 X 11.75] Brown + Product Details Size -+ Product Details Size 4"w X 10"h or 10" x 4" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 5. 75" width X 11. 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