18"W X 34"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 19.75"W X 35.75"H] w6h6 For a visual guide on Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

For a visual guide on how to measure your vent hole before ordering a grille

+ Product Details Size - 28"w X 26"h is the size for the duct opening measurement only

+ Product Details Size – 36"w X 8"h is the size for the duct opening measurement only

and centralized air ducted units

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18"W X 34"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 19.75"W X 35.75"H] w6h6 For a visual guide on Compatible With Duct 7in Applications This sheet metal DDAG A 1212 For a visual guide on how to measure your vent hole before ordering a grille + Product Details Size 28"w X 26"h is the size for the duct opening measurement only