4" X 30" Or 30" X 4" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: [5.75 X 31.75] Sheet Metal Fittings actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in

actual front end outer dimensions are approximately 10 5/8" width X 16 5/8" height

+ Product Details Size - 8"w X 6"h X 2"d (for duct opening measurement only)

+ Product Details Size & Compatibility – The size of galvanized sheet metal straight floor boot is 10" X 4" X 4"

+ Product Details Size – 16" X 16" is the size for the drywall opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 14" duct opening (measured at the opening)

4" X 30" Or 30" X 4" Heavy Duty Floor Grille Fixed Blades Air Grille Brown [Outer Dimensions: [5.75 X 31.75] Sheet Metal Fittings actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in actual front end outer dimensions are approximately 10 5 8" width X 16 5 8" height + Product Details Size 8"w X 6"h X 2"d (for duct opening measurement only)