4"W X 26"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 5.75"W X 27.75"H] Filter Grille + Product Details Size –

+ Product Details Size – 12" x 24" or 24" x 12" is the size for the duct opening measurement only

Elevate both functionality and aesthetics with the Louver Floor Register

+ Product Details Size – 10" x 16" or 16" x 10" is the size for the duct opening measurement only

And is classified as Class 1 Fire Proof - B1

rust-free aluminum construction with smooth finished edges and counter-sunk screw holes (screws included)

4"W X 26"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 5.75"W X 27.75"H] Filter Grille + Product Details Size –+ Product Details Size 4"w X 26"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 5. 75" width X 27. 75" height. Design Easy unrestricted airflow for your HVAC system 50 angled to provide maximum airflow. High Quality Solid stamped steel with counter sunk screw holes (screws included) and no sharp edges. Powder Coat Finish Smooth, shiny, scratch resistant, beautiful. Looks like it was just waxed.