6" X 20" Or 20" X 6" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 7.75 X 21.75] Width_22in + Product Details Size –

+ Product Details Size – 20" x 30" or 30" x 20" is the size for the duct opening measurement only

+ Product Details Size & Compatibilty - The 14" to 12" round metal pipe reducer & increaser 30 gauge is compatible with duct 14" to 12"

you can quickly adjust airflow for year-round comfort

actual front end outer dimensions are approximately 11" width X 11" height -

+ Product Details Size & Compatibility – The 10" stick-on Side take-off is compatible with duct 10"

6" X 20" Or 20" X 6" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 7.75 X 21.75] Width_22in + Product Details Size –+ Product Details Size 6"w X 20"h or 20" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 75" width X 21. 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