6"W X 20"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 7.75"W X 21.75"H] Powder Coated The first number in a 14" Round Duct Pipe For 10 duct opening FR M 414 White

The first number in a grille size represents the width

+ Product Details Size - 20"w X 34"h is the size for the duct opening measurement only

+ Product Details Size - 22"w X 8"h is the size for the duct opening measurement only

+ Product Details Size - 24"w X 6"h is the size for the duct opening measurement only

6"W X 20"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 7.75"W X 21.75"H] Powder Coated The first number in a 14" Round Duct Pipe For 10 duct opening FR M 414 White The first number in a grille size represents the width + Product Details Size 20"w X 34"h is the size for the duct opening measurement only