18" X 30" Or 30" X 18" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 19.75 X 31.75] Color_Red Oak Wood Actual Filter Size – 17

Actual Filter Size – 17 3/4"w x 25 3/4" x 1"

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

actual front end outer dimensions are 3"

+ Product Details Size – 24" X 24" is the size for the drywall opening measurement only

18" X 30" Or 30" X 18" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 19.75 X 31.75] Color_Red Oak Wood Actual Filter Size – 17+ Product Details Size 18"w X 30"h or 30" x 18" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 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