16"W X 20"H [Duct Opening] ALUMINUM RETURN GRILLE - EASY AIR FLOW - LINEAR BAR GRILLES [OUTER DIMENSIONS: 17.875"W X 21.875"H] 18" Round Duct Pipe + Product Spec Sheet Aluminum

+ Product Spec Sheet Aluminum Return Grille Spec Sheet

Ideal for Walls & Ceilings: Designed for seamless installation in standard 6" X 6" duct openings

+ Product Details Size - 30"w X 28"h X 2"d (for duct opening measurement only)

+ Product Details Size - 20"w X 12"h X 2"d (for duct opening measurement only)

Height vs Width: The first number in a floor register size

16"W X 20"H [Duct Opening] ALUMINUM RETURN GRILLE - EASY AIR FLOW - LINEAR BAR GRILLES [OUTER DIMENSIONS: 17.875"W X 21.875"H] 18" Round Duct Pipe + Product Spec Sheet Aluminum+ Product Details Size 16"w X 20"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 875" width X 21. 875" height. High Quality High quality aluminum with counter sunk screw holes (screws included) and no sharp edges. Design Unrestricted airflow For Your HVAC system noise free components no vibrating louvers etc. Powder Coat Finish Smooth, shiny, scratch resistant, beautiful. Looks like it was