14" X 12" [Duct Opening] 3-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 15.75"W X 13.75"H] Powder-Coat + Product Details Size – 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size – 8"w X 36"h is the size for the duct opening measurement only

Installation Location – Suitable for both sidewall and ceiling installation

+ Product Details Size - 36"w X 10"h is the size for the duct opening measurement only

For 12" Round Duct Opening - Spiral or Flex

+ Product Details Size - 28"w X 12"h is the size for the duct opening measurement only

14" X 12" [Duct Opening] 3 Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 15.75"W X 13.75"H] Powder Coat + Product Details Size – 4 X 12 Is CRFG2028 Width_14in + Product Details Size – 8"w X 36"h is the size for the duct opening measurement only Installation Location – Suitable for both sidewall and ceiling installation