10"W X 20"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 11.75"W X 21.75"H] Aluminum - Cube Core Design – Removable frame for Height_16in RG1612AL Product Details Size 14

Design – Removable frame for easy filter change & cleaning - uses a 1" thick filter

Dimensions With Outer End are 7

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actual front end outer dimensions are approximately 12 5/8" width X 22 5/8" height -

+ Product Details Size – 12"w X 4"h is the size for the duct opening measurement only

10"W X 20"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 11.75"W X 21.75"H] Aluminum Cube Core Design – Removable frame for Height_16in RG1612AL Product Details Size 14 Design – Removable frame for easy filter change & cleaning uses a 1" thick filter Dimensions With Outer End are 7