12" X 20" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 21.75 X 13.75] Line Covers + Product Details Size -

+ Product Details Size - 20"w X 4"h is the size for the duct opening measurement only

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Having an HVAC Access Door will give easy access to the mechanical features of the system

+ Product Description Introducing our 4" x 10" or 10" x 4" Floor Grille - a reliable and durable air grill designed for exceptional performance and built to last

compatible with duct 5"

12" X 20" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 21.75 X 13.75] Line Covers + Product Details Size -+ Product Details Size 12" x 20" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 75" width X 13. 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 shrink wrapped