10" X 30" or 30" X 10" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 11.75 X 31.75] w24h24 3/8” - 4223 PSI

3/8” - 4223 PSI

with an additional 1 7/8" width and 2" height

The total outer size of this grille is the listed size plus plus 2 and 5/8"

With a 7-inch size

crawlspace etc

10" X 30" or 30" X 10" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 11.75 X 31.75] w24h24 3/8” - 4223 PSI+ Product Details Size 10"w X 30"h or 30" x 10" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 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