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 it ensures long-lasting performance in

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

+ Product Details Size - 8"w X 28"h is the size for the duct opening measurement only

this fitting is perfectly compatible with 5-inch ducts

+ Product Details Size – 24" x 24" with 10" collar T-Bar drop ceiling perforated return grill - metal back casing

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 it ensures long-lasting performance in+ 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