22"W X 20"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 23.75"W X 21.75"H] w26h26 + Product Details Size - 4 X 12 Is CRFG2028 Width_14in

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

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

+ Product Details Size – 16"w X 6"h is the size for the duct opening measurement only

+ Product Details Size - 24"w X 18"h is the size for the duct opening measurement only

7/8" Insulated Copper Coil Line - Seamless Pipe Tube for HVAC

22"W X 20"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 23.75"W X 21.75"H] w26h26 + Product Details Size 4 X 12 Is CRFG2028 Width_14in + Product Details Size 16"w X 18"h is the size for the duct opening measurement only + Product Details Size 12"w X 36"h is the size for the duct opening measurement only