14"w X 8"h [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 15.75"W X 9.75"H] w12h12 of up to 300m3/h 4 X 12 Is CRFG2028 Width_14in

of up to 300m3/h

+ Product Details Size – 20"w X 40"h is the size for the duct opening measurement only

+ Product Details Size – 28"w X 30"h is the size for the duct opening measurement only

+ Product Details Size - 16"w X 22"h is the size for the duct opening measurement only

+ Product Details Size - 25"w X 20"h is the size for the duct opening measurement only

14"w X 8"h [Duct Opening] 1 Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 15.75"W X 9.75"H] w12h12 of up to 300m3 h 4 X 12 Is CRFG2028 Width_14in of up to 300m3 h + Product Details Size – 20"w X 40"h is the size for the duct opening measurement only