36"W X 10"H [Duct Opening] ALUMINUM RETURN GRILLE - Easy Air Flow - Linear Bar Grilles [Outer Dimensions: 37.875"W X 11.875"H] 10" Round Duct Pipe actual front end outer dimensions

actual front end outer dimensions are approximately 14 5/8" width X 20 5/8" height -

actual front end outer dimensions are approximately 30 5/8" width X 8 5/8" height

Actual Front End Outer Dimensions Are 12" Width X 8" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

Ideal for Walls & Ceilings: Designed for seamless installation in standard 16" X 16" duct openings

4" X 12" Is The Size For The Duct Opening (floor/vent hole) Measurement Only

36"W X 10"H [Duct Opening] ALUMINUM RETURN GRILLE - Easy Air Flow - Linear Bar Grilles [Outer Dimensions: 37.875"W X 11.875"H] 10" Round Duct Pipe actual front end outer dimensions+ Product Details Size 36"w X 10"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 37. 875" width X 11. 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