4"W X 18"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 5.75"W X 19.75"H] Fixed Blades with Damper accordion-container { border: 1px solid Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

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R value rating of insulation - R3

+ Product Details Size – 24"w X 12"h is the size for the duct opening measurement only

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Quality Packaging - Carefully Shrink Wrapped With Cardboard Backing To Prevent Damage In Shipment

4"W X 18"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 5.75"W X 19.75"H] Fixed Blades with Damper accordion container { border: 1px solid Compatible With Duct 7in Applications This sheet metal DDAG A 1212 accordion container { border: 1px solid #5296DD R value rating of insulation R3