14"W X 24"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 15.75"W X 25.75"H] flat stamped steel and the second number represents Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

and the second number represents the height

+ Product Details Size – 6" x 6" is the size for the duct opening measurement only

Crafted from high-quality red oak wood

+ Product Details Size - 12"w X 32"h is the size for the duct opening measurement only

+ Product Details Size – 20"w X 10"h is the size for the duct opening measurement only

14"W X 24"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 15.75"W X 25.75"H] flat stamped steel and the second number represents Compatible With Duct 7in Applications This sheet metal DDAG A 1212 and the second number represents the height + Product Details Size – 6" x 6" is the size for the duct opening measurement only