20"W X 30"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 21.75"W X 31.75"H] Copper Coil-Insulated Line Set + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size – 36"w X 8"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

+ Product Details Size – 18"w X 8"h is the size for the duct opening measurement only

Each grille is carefully packaged with cardboard backing to prevent damage during shipment

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20"W X 30"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 21.75"W X 31.75"H] Copper Coil Insulated Line Set + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size – 36"w X 8"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