30"W X 28"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 31.75"W X 29.75"H] w24h24 + Product Details Size - 4 X 12 Is CRFG2028 Width_14in
Yard notes & kiln story
Description
+ Product Details Size - 4"w X 24"h is the size for the duct opening measurement only
Its smooth
+ Product Details Size - 12"w X 18"h is the size for the duct opening measurement only
Pre-flared ends with nuts are for simple and easy installation
expanding or retracting the gap to meet your precise needs
30"W X 28"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 31.75"W X 29.75"H] w24h24 + Product Details Size 4 X 12 Is CRFG2028 Width_14in + Product Details Size 4"w X 24"h is the size for the duct opening measurement only Its smooth