10"W X 32"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 11.75"W X 33.75"H] Insulated Line + Product Details Size - Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size - 18"w X 14"h is the size for the duct opening measurement only

+ Product Details Size - 36"w X 14"h is the size for the duct opening measurement only

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10"W X 32"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 11.75"W X 33.75"H] Insulated Line + Product Details Size Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size 18"w X 14"h is the size for the duct opening measurement only + Product Details Size 36"w X 14"h is the size for the duct opening measurement only