4" X 24" or 24" x 4" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 5.75 X 25.75] sidewall + Product Details Size –

+ Product Details Size – 8"w X 16"h or 16" x 8" is the size for the duct opening measurement only

Durable Material - 30 Gauge Thick & Made of Thick & Durable Galvanized Sheet Metal - Used For HVAC System Duct Work In Any Building or Home

+ Product Description Introducing our revolutionary Anisotropic Magnetic Vent Covers

R6 Fiberglass Back Plenum accepts 6" to 18" Round Spin-in Collars or Start Collars (not included) - Accepts 1" disposable filter (not included) - Recommended Size: 20x20x1

4" X 24" or 24" x 4" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 5.75 X 25.75] sidewall + Product Details Size –+ Product Details Size 4"w X 24"h or 24" x 4" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 5. 75" width X 25. 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