This size fits standard duct opening of 4" diameter
The air return vent is provided with an 8 mm overall frame/lip to provide stability as a drop down into the duct opening
FACEPLATE SPECIFICATIONS: Metal Type: Sand Cast Aluminum Metal Face Plate Overall size: 5.5" Face Plate Thickness: 1/4"
HANDMADE BY SKILLED ARTISANS: Freshen up the look of your home with the stylish and attractive Achteck design grill hand-made by skilled artisans.
Industrial Design Patent Pending 196854
RUST FREE METAL: The remarkable quality register is rust-free and long-lasting. It is powder-coated in Fine Grain Matte Finish which is easy to clean with a soft brush and maybe repainted with metal spray paint as per the color of your choice
DESIGN COVERAGE / EMPTY AREA RATIO: The Achteck vent is designed, making the optimum use of coverage across the grate for durability, delivering an adequate flow of heated or cooled air from the air duct.