18"W X 6"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 19.75"W X 7.75"H] w30h30 + Product Details Size - Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size - 8"w X 34"h is the size for the duct opening measurement only

+ Product Description Enhance your ventilation system with our high-quality grilles and registers

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18"W X 6"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 19.75"W X 7.75"H] w30h30 + Product Details Size Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size 8"w X 34"h is the size for the duct opening measurement only + Product Description Enhance your ventilation system with our high quality grilles and registers