25"W X 20"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 26.75"W X 21.75"H] 10in diameter + Product Details Size – 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size – 20"w X 6"h is the size for the duct opening measurement only

length with fittings on each end and cut marks every 19

+ Product Details Size - 20"w X 20"h Is The Size For The Duct Opening Only

Actual Filter Size – 25 3/4"w x 21 3/4" x 1"

Made of high-quality PE material with inner black liner

25"W X 20"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 26.75"W X 21.75"H] 10in diameter + Product Details Size – 4 X 12 Is CRFG2028 Width_14in + Product Details Size – 20"w X 6"h is the size for the duct opening measurement only length with fittings on each end and cut marks every 19