16" X 20" or 20" X 16" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 17.75 X 21.75] Wall Angle Floor Boot You can use these couplings

You can use these couplings for all things plumbing including drinking water

allowing easy attachment of straight or split fittings for your ductwork needs

L/H@0 FT: - 38

actual front end outer dimensions are approximately 27 5/8" width X 12 5/8" height

Wall Cover - Immediately Improves the appearance of mini-split

16" X 20" or 20" X 16" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 17.75 X 21.75] Wall Angle Floor Boot You can use these couplings+ Product Details Size 16"w X 20"h or 20" X 16" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 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