12" X 10" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 13.75 X 11.75] 18in diameter + Product Details Size –

+ Product Details Size – 26" x 36" or 36" x 26" is the size for the duct opening measurement only

Made of high-quality PE material with inner black liner

actual front end outer dimensions are approximately 20 5/8" width X 36 5/8" height

heavy-duty weatherproof molded bottom that shields your tools from rust and damage

12" X 10" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 13.75 X 11.75] 18in diameter + Product Details Size –+ Product Details Size 12"w X 10"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 75" width X 11. 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 shrink