10" X 4" [Duct Opening] 1-Way Air Vent Adjustable Aluminum Curved Blades Integral Multi-Shutter Damper HVAC Diffuser [Outer Dimensions: 11.75"W X 5.75"H] Return + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size – 14" X 4" is the size for the duct opening (floor/vent hole) measurement only

these airflow control components provide you with effortless control over your indoor environment

+ Product Details Size - 10"w X 10"h is the size for the duct opening measurement only

+ Product Details Size – 20"w X 28"h is the size for the duct opening measurement only

also referred to as T-Bar or Lay-in system

10" X 4" [Duct Opening] 1 Way Air Vent Adjustable Aluminum Curved Blades Integral Multi Shutter Damper HVAC Diffuser [Outer Dimensions: 11.75"W X 5.75"H] Return + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size – 14" X 4" is the size for the duct opening (floor vent hole) measurement only these airflow control components provide you with effortless control over your indoor environment