20" X 6" [Duct Opening] 2-Way Horizontal Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 21.75"W X 7.75"H] Powder-Coat + Product Details Size -

+ Product Details Size - 18"w X 32"h is the size for the duct opening measurement only

+ Product Details Size – 24" x 24" with 10" collar T-Bar drop ceiling perforated return grill - metal back casing

+ Product Details Size – 22"w X 26"h is the size for the duct opening measurement only

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

actual front end outer dimensions are approximately 28 5/8" width X 22 5/8" height

20" X 6" [Duct Opening] 2-Way Horizontal Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 21.75"W X 7.75"H] Powder-Coat + Product Details Size -+ Product Details Size 20"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 75" width X 7. 75" height. High Quality High quality steel with counter sunk screw holes (screws included) and no sharp edges. Equipped with a lever for easy airflow adjustment and dampening. Airflow Control Adjustable airflow lever allows precise control over the direction and volume of air. Installation