16"W X 6"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 17.75"W X 7.75"H] w28h28 + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size – 30"w X 12"h is the size for the duct opening measurement only

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

+ Product Details Size - 20"w X 18"h is the size for the duct opening measurement only

+ Product Description Upgrade your HVAC system with a high-quality aluminum return grille designed for a clean

Pressure rating: 2300 to 6500 psi

16"W X 6"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 17.75"W X 7.75"H] w28h28 + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size – 30"w X 12"h is the size for the duct opening measurement only + Product Details Size 26"w X 26"h is the size for the duct opening measurement only