8"W X 18"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 9.75"W X 19.75"H] 6" Diameter + Product Details Size - 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size - 20"w X 20"h Is The Size For The Duct Opening Only

+ Product Details Size – 26"w X 30"h is the size for the duct opening measurement only

Item Size: 185 x 36 x 34 mm

5” flexible joint is used to cover the parts of your HVAC line set that is placed at odd angles and hard-to-reach spaces

+ Product Details Size - 34"w X 32"h is the size for the duct opening measurement only

8"W X 18"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 9.75"W X 19.75"H] 6" Diameter + Product Details Size 4 X 12 Is CRFG2028 Width_14in + Product Details Size 20"w X 20"h Is The Size For The Duct Opening Only + Product Details Size – 26"w X 30"h is the size for the duct opening measurement only