18"W X 24"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 19.75"W X 25.75"H] flat stamped steel + Product Details Size - Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size - 20"w X 24"h is the size for the duct opening measurement only

background-color: #5296DD

+ Product Details Size - 36"w X 6"h is the size for the duct opening measurement only

+ Product Details Size - 20"w X 28"h is the size for the duct opening measurement only

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18"W X 24"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 19.75"W X 25.75"H] flat stamped steel + Product Details Size Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size 20"w X 24"h is the size for the duct opening measurement only background color: #5296DD