18"W X 20"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 19.75"W X 21.75"H] Aluminum Design – Rigid gauge built 4 X 12 Is CRFG2028 Width_14in
Yard notes & kiln story
Description
18"W X 20"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 19.75"W X 21.75"H] Aluminum Design – Rigid gauge built 4 X 12 Is CRFG2028 Width_14in Design – Rigid gauge built for durability and long life in mind + Product Details Size 6"w X 6"h is the size for the duct opening measurement only