20"W X 12"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 21.75"W X 13.75"H] Ceiling + Product Details 4 X 12 Is CRFG2028 Width_14in
Yard notes & kiln story
Description
20"W X 12"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 21.75"W X 13.75"H] Ceiling + Product Details 4 X 12 Is CRFG2028 Width_14in + Product Details + Product Details Size 34"w X 14"h is the size for the duct opening measurement only