Truaire C166-VSN 02X12(Duct Opening Measurements) Decorative Floor Grille 2-Inch by 12-Inch Vintage Victorian Floor Diffuser, Satin Nickel Finish Smoothglide damper Model Size Indicates Duct Opening Measurements not Wall Opening Measurements. High quality steel components , no plastic High quality plating The actual face size is 13.5-inch in width and 3.5-inch in height.