10"w X 10"h [Duct Opening] 3-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 11.75"W X 11.75"H] 18in diameter + Product Details Size - Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size - 22"w X 18"h is the size for the duct opening measurement only

+ Product Details Size – 14"w X 30"h is the size for the duct opening measurement only

+ Product Details Size - 28"w X 16"h is the size for the duct opening measurement only

+ Product Details Size – 6" x 8" or 8" x 6" is the size for the duct opening measurement only

875" width X 25

10"w X 10"h [Duct Opening] 3 Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 11.75"W X 11.75"H] 18in diameter + Product Details Size Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size 22"w X 18"h is the size for the duct opening measurement only + Product Details Size – 14"w X 30"h is the size for the duct opening measurement only