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 actual front end outer dimensions

actual front end outer dimensions are approximately 16 5/8" width X 16 5/8" height

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

+ Product Details Size – The size 30-gauge stick-on collar is 4" and it is compatible with duct 4"

/* slightly looser */ color: #333

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 actual front end outer dimensions+ 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