20" X 30" or 30" X 20" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 21.75 X 31.75] Height_24in actual front end outer dimensions

actual front end outer dimensions are approximately 16 5/8" width X 8 5/8" height

actual front end outer dimensions are 17

+ Product Details Size & Compatibility – The size of sheet metal pipe is 4" round x 24" long

This versatile diffuser is adaptable to various airflow needs

it integrates effortlessly into T-bar or plaster frame ceilings

20" X 30" or 30" X 20" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 21.75 X 31.75] Height_24in actual front end outer dimensions+ Product Details Size 12"w X 30"h or 30" x 12" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 75" width X 31. 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