8" X 10" Or 10" X 8" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 9.75 X 11.75] Material_Aluminum 6" x 6" - opening

6" x 6" - opening (vent hole - Neck Size) dimension - actual size is approx 2" wider

Follow the manual’s instructions for cleaning the internal components if required

24" x 6" Aluminum Spiral Duct Air Vent Grille Cover - Fully Adjustable Double Deflection HVAC Air Supply

For HVAC a 1/2" fitting

Actual Filter Size – 33 3/4"w x 5 3/4" x 1"

8" X 10" Or 10" X 8" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 9.75 X 11.75] Material_Aluminum 6" x 6" - opening+ Product Details Size 8"w X 10"h or 10" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 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