24" X 30" or 30" X 24" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 25.75 X 31.75] Oval Stack Head + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 18" x 12" OR 12" X 18" duct opening (measured at the opening)

actual front end outer dimensions are approximately 24 5/8" width X 10 5/8" height

+ Product Details Size & Compatibility – The size of sheet metal pipe is 4" round x 24"long

With a 12-inch size

24" X 30" or 30" X 24" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 25.75 X 31.75] Oval Stack Head + Product Details Perfect Fit+ Product Details Size 24"w X 30"h or 30" X 24" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 25. 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