4" x 12" Or 12" X 4" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 5.75 X 13.75] Floor Grille Toe Space actual front end outer dimensions

actual front end outer dimensions are approximately 18 5/8" width X 30 5/8" height

Actual Filter Size – 19 3/4"w x 13 3/4" x 1"

We use special materials To prevent corrosion

+ Product Details Size – 28" x 30 or 30" x 28" 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] Floor Grille Toe Space actual front end outer dimensions+ 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