6" X 20" Or 20" X 6" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 7.75 X 21.75] w12h12 MERV 8 is the most

MERV 8 is the most reccomeded level of filteration by industry professionels

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

this heavy-duty work belt is constructed with durable 1680D Polyester and boasts reinforced pouch bottoms

+ Product Details Size & Compatibility – The size of sheet metal pipe is 5" round x 24"long

6" X 20" Or 20" X 6" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 7.75 X 21.75] w12h12 MERV 8 is the most+ Product Details Size 6"w X 20"h or 20" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 75" width X 21. 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