10" X 30" or 30" X 10" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 11.75 X 31.75] w24h24 The insulation

The insulation

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

background-color: #5296DD

crawlspace etc

+ Product Details Size – 8"w X 10"h is the size for the duct opening measurement only

10" X 30" or 30" X 10" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 11.75 X 31.75] w24h24 The insulation+ 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