20" X 30" or 30" X 20" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 21.75 X 31.75] w28h28 + Product Description Introducing our

+ Product Description Introducing our Rectangular Duct Cap

these heavy-duty louvers are ideal for use in attics

+ Product Details Size - 30"w X 16"h X 2"d (for duct opening measurement only)

actual front end outer dimensions are approximately 32 5/8" width X 10 5/8" height -

Actual Filter Size – 33 3/4"w x 11 3/4" x 1"

20" X 30" or 30" X 20" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 21.75 X 31.75] w28h28 + Product Description Introducing our+ Product Details Size 12"w X 30"h or 30" x 12" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 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