10" X 24" or 24" X 10" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 11.75 X 25.75] w8h8 1x 90° Vertical Elbow

1x 90° Vertical Elbow

+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 16" OR 16" x 20" duct opening (measured at the opening)

Filter Size - 23

actual front end outer dimensions are 15

With a 4-inch size

10" X 24" or 24" X 10" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 11.75 X 25.75] w8h8 1x 90° Vertical Elbow+ Product Details Size 10"w X 24"h or 24" x 10" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 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