20"W X 14"H [Duct Opening] ALUMINUM RETURN GRILLE - Easy Air Flow - Linear Bar Grilles [Outer Dimensions: 21.875"W X 15.875"H] Compatible with Duct 10" actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in

actual front end outer dimensions are approximately 24 5/8" width X 31 5/8" height

+ Product Details Size - 12"w X 36"h is the size for the duct opening measurement only

+ Product Details Size – 12" x 12" is the size for the duct opening measurement only

screws same color as vent cover

Ideal for Walls & Ceilings: Designed for seamless installation in standard 30" X 6" duct openings

20"W X 14"H [Duct Opening] ALUMINUM RETURN GRILLE Easy Air Flow Linear Bar Grilles [Outer Dimensions: 21.875"W X 15.875"H] Compatible with Duct 10" actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in actual front end outer dimensions are approximately 24 5 8" width X 31 5 8" height + Product Details Size 12"w X 36"h is the size for the duct opening measurement only