12"w X 6"h [Duct Opening] 2-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 7.75"H] w6h6 This grille enhances airflow efficiency 4 X 12 Is CRFG2028 Width_14in

This grille enhances airflow efficiency

+ Product Details Size - 12"w X 8"h X 2"d (for duct opening measurement only)

+ Product Details Size - 16"w X 18"h is the size for the duct opening measurement only

Actual Filter Size – 25 3/4"w x 31 3/4" x 1"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 10" x 16" or 16" x 10" duct opening (measured at the opening)

12"w X 6"h [Duct Opening] 2 Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 7.75"H] w6h6 This grille enhances airflow efficiency 4 X 12 Is CRFG2028 Width_14in This grille enhances airflow efficiency + Product Details Size 12"w X 8"h X 2"d (for duct opening measurement only)