20" X 26" Or 26" X 20" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 21.75 X 27.75] Drop Ceilings / Lay-In plus { display: inline-block

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+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 12" or 12" x 8" duct opening (measured at the opening)

Achieve the perfect airflow with adjustable control by rotating the middle disk

+ Product Details Size – Stick-on collar is 14" and it is compatible with duct 14"

20" X 26" Or 26" X 20" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 21.75 X 27.75] Drop Ceilings / Lay-In plus { display: inline-block+ Product Details Size 20"w X 26"h or 26" x 20" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 75" width X 27. 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