4" x 12" Or 12" X 4" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 5.75 X 13.75] 5in diameter this fitting is perfectly compatible

this fitting is perfectly compatible with 5-inch ducts

it ensures long-lasting performance in both residential and commercial settings

Actual Front End Outer Dimensions Are 14" Width X 10" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

+ Product Details Size – 16" x 16" is the size for the duct opening measurement only

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

4" x 12" Or 12" X 4" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 5.75 X 13.75] 5in diameter this fitting is perfectly compatible+ Product Details Size 4" x 12" or 12" x 4" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 5. 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