12" X 12" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 13.75 X 13.75] 8 Feet Long our access door offers high

our access door offers high durability with superior corrosion and rust protection

+ Product Details Size – 16"w X 36"h is the size for the duct opening measurement only

Actual Filter Size – 21 3/4"w x 11 3/4" x 1"

Upgrade today for better performance and cleaner air

+ Product Details Size – 10" X 4" is the opening (vent hole) dimension - actual size is approx

12" X 12" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 13.75 X 13.75] 8 Feet Long our access door offers high+ Product Details Size 12"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 75" width X 13. 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