Truaire CA102M  10X06(Duct Opening Measurements) 2-Way Aluminum Supply 10-Inch by 6-Inch Sidewall or Ceiling Aluminum Register Grille, White Smoothglide damper Model Size Indicates Duct Opening Measurements not Wall Opening Measurements. High quality steel components , no plastic High quality powder coated The actual face size is 11.75-inch in width and 7.75-inch in height.