20"w X 20"h Extruded Aluminum Adjustable Surface Mount Supply Ceiling HVAC Air Grille – Interchangeable: 1-Way, 2-Way, 3-Way or 4-Way - Vent Duct Cover [Outer Dimensions: 21.125" X 21.125"] Powder Coated actual front end outer dimensions Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

actual front end outer dimensions are approximately 12 5/8" width X 16 5/8" height

+ Product Details Size – 50"w X 20"h is the size for the duct opening measurement only

+ Product Details Size - 24"w X 32"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 20 5/8" width X 20 5/8" height

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20"w X 20"h Extruded Aluminum Adjustable Surface Mount Supply Ceiling HVAC Air Grille – Interchangeable: 1 Way, 2 Way, 3 Way or 4 Way Vent Duct Cover [Outer Dimensions: 21.125" X 21.125"] Powder Coated actual front end outer dimensions Compatible With Duct 7in Applications This sheet metal DDAG A 1212 actual front end outer dimensions are approximately 12 5 8" width X 16 5 8" height + Product Details Size – 50"w X 20"h is the size for the duct opening measurement only