8" X 4" [Duct Opening] 1-Way Air Vent Adjustable Aluminum Curved Blades Integral Multi-Shutter Damper HVAC Diffuser [Outer Dimensions: 9.75"W X 5.75"H] 6" Round Duct Pipe These are specially sized to Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

These are specially sized to fit into all drop ceilings

75" Width X 17

+ Product Details Size - 20"w X 2"h is the size for the duct opening measurement only

A: Black Grilles Always Look Sharp And Never Show DIrt & Dust Marks

actual front end outer dimensions are approximately 27 5/8" width X 24 5/8" height

8" X 4" [Duct Opening] 1 Way Air Vent Adjustable Aluminum Curved Blades Integral Multi Shutter Damper HVAC Diffuser [Outer Dimensions: 9.75"W X 5.75"H] 6" Round Duct Pipe These are specially sized to Compatible With Duct 7in Applications This sheet metal DDAG A 1212 These are specially sized to fit into all drop ceilings 75" Width X 17