20"W X 24"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 21.75"W X 25.75"H] Insulated Line Set + Product Details Size - 190RF 10X20 FBA crafted from heavy gauge Compatible With Duct 7in

+ Product Details Size - 30"w X 8"h is the size for the duct opening measurement only

positioning supply and return grills accordingly

Some of the best features aren't readily apparent

This grille is ideal for both sidewall and ceiling installations

High Quality – Rigid aluminum construction with counter-sunk screw holes (screws included) and no sharp edges

20"W X 24"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 21.75"W X 25.75"H] Insulated Line Set + Product Details Size 190RF 10X20 FBA crafted from heavy gauge Compatible With Duct 7in + Product Details Size 30"w X 8"h is the size for the duct opening measurement only positioning supply and return grills accordingly