8" X 18" Or 18" X 8" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 9.75 X 19.75] 8" Round Duct Pipe Actual Filter Size – 21

Actual Filter Size – 21 3/4"w x 19 3/4" x 1"

For added protection

polished brass

compatible with duct 10" | 10-Pack of 2' pipe – 20 foot length when connected – 26 gauge thick & made of thick & durable galvanized sheet metal

+ Product Description Introducing our Sound-Rated Access Door

8" X 18" Or 18" X 8" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 9.75 X 19.75] 8" Round Duct Pipe Actual Filter Size – 21+ Product Details Size 8"w X 18"h or 18" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 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