12" X 18" Or 18" X 12" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 13.75 X 19.75] Round Duct Pipe and versatile for any project

and versatile for any project

The ring base allows installation without removing the thermostat

+ Product Details Size – 8"w X 20"h or 20" x 8" is the size for the duct opening measurement only

Actual Filter Size – 7 3/4"w x 31 3/4" x 1"

75"H – fits a 18" X 10" duct opening

12" X 18" Or 18" X 12" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 13.75 X 19.75] Round Duct Pipe and versatile for any project+ Product Details Size 12"w X 18"h or 18" x 12" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 75" width X 19. 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