6" X 16" or 16" X 6" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 7.75 X 17.75] Access Door + Product Details Size - const content item 1-Way CRFG3630

+ Product Details Size - 8"w X 26"h is the size for the duct opening measurement only

+ Product Details Size - 44"W X 8"H is (for duct opening measurement only)

+ Product Details Size – 12" x 24" or 24" x 12" is the size for the duct opening measurement only

+ Product Details Size & Compatibility – The size of sheet metal pipe is 10" round x 10' long

each diffuser is carefully shrink-wrapped with a sturdy cardboard backing

6" X 16" or 16" X 6" Heavy Duty Floor Grille Fixed Blades Air Grille Brown [Outer Dimensions: 7.75 X 17.75] Access Door + Product Details Size const content item 1 Way CRFG3630 + Product Details Size 8"w X 26"h is the size for the duct opening measurement only + Product Details Size 44"W X 8"H is (for duct opening measurement only)