8" X 24" Or 24" X 8" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 9.75 X 25.75] 1-Way & EN 13180 standards

& EN 13180 standards

Actual Filter Size – 23 3/4"w x 29 3/4" x 1"

this 30-gauge stick-on collar is specifically sized at 4 inches

+ Product Details Size – 20"w X 25"h is the size for the duct opening measurement only

8" X 24" Or 24" X 8" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 9.75 X 25.75] 1-Way & EN 13180 standards+ Product Details Size 8"w X 24"h or 24" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 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