16" X 16" [Duct Opening] 3-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 17.75"W X 17.75"H] Width_20in these pipes offer easy handling Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

these pipes offer easy handling

+ Product Details Size - 36"w X 20"h is the size for the duct opening measurement only

or office environments

+ Product Details Size - 25"w X 32"h is the size for the duct opening measurement only

Actual Filter Size – 11 3/4"w x 31 3/4" x 1"

16" X 16" [Duct Opening] 3 Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 17.75"W X 17.75"H] Width_20in these pipes offer easy handling Compatible With Duct 7in Applications This sheet metal DDAG A 1212 these pipes offer easy handling + Product Details Size 36"w X 20"h is the size for the duct opening measurement only