20" X 25" Or 25" X 20" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 21.75 X 26.75] Compatible With Duct 7in + Product Details Size –

+ Product Details Size – Stick-on collar is 7" and it is compatible with duct 7"

this diffuser ensures long-lasting durability and adds a touch of elegance to any space

Auto Switch On Sensor: Yes

+ Product Details Size – 18"w X 10"h is the size for the duct opening measurement only

+ Product Details Size - 20"w X 26"h X 2"d (for duct opening measurement only)

20" X 25" Or 25" X 20" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 21.75 X 26.75] Compatible With Duct 7in + Product Details Size –+ Product Details Size 20"w X 25"h o 25" x 20" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 75" width X 26. 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