6" X 20" Or 20" X 6" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 7.75 X 21.75] Compatible with Duct 7" + Product Details Size -

+ Product Details Size - 18"w X 18"h Is The Size For The Duct Opening Only

actual front end outer dimensions are approximately 27 5/8" width X 34 5/8" height

actual front end outer dimensions are approximately 38 5/8" width X 14 5/8" height -

This ensures superior performance and efficiency in any application

this easy-to-install grille fits seamlessly into any standard return filter opening

6" X 20" Or 20" X 6" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 7.75 X 21.75] Compatible with Duct 7" + Product Details Size -+ Product Details Size 6"w X 20"h or 20" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 75" width X 21. 75" height. High Quality High grade steel construction meant for high foot traffic areas. Installation Location Floor. Design Easy drop in installation. Powder Coat Finish Smooth, shiny, scratch resistant, with no sharp edges. Looks like it was just waxed. Quality Packaging Carefully