4" X 30" Or 30" X 4" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: [5.75 X 31.75] 2-Way Deflection + Product Details Size -

+ Product Details Size - 10"w X 4"h is the size for the duct opening measurement only

Crafted from high-quality aluminum

Installation – Installs directly on round & oval spiral duct - no frames

Actual Filter Size – 19 3/4"w x 17 3/4" x 1"

Design – Fixed Hinged for easy filter change & cleaning - uses a 1" thick filter

4" X 30" Or 30" X 4" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: [5.75 X 31.75] 2-Way Deflection + Product Details Size -+ Product Details Size 4"w X 30"h or 30" x 4" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 5. 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