14" X 12" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 15.75"W X 13.75"H] white actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in

actual front end outer dimensions are approximately 14 5/8" width X 16 5/8" height

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

Actual Filter Size – 25 3/4"w x 27 3/4" x 1"

+ Product Details Size – 4"w X 12"h is the size for the duct opening measurement only

Durable stamped steel construction ensures long-lasting performance

14" X 12" [Duct Opening] 1 Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 15.75"W X 13.75"H] white actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in actual front end outer dimensions are approximately 14 5 8" width X 16 5 8" height + Product Details Size – 16"w X 16"h is the size for the duct opening measurement only