40"W X 16"H [Duct Opening] ALUMINUM RETURN GRILLE - Easy Air Flow - Linear Bar Grilles [Outer Dimensions: 41.875"W X 17.875"H] 18" Diameter These are specially sized to

These are specially sized to fit into all drop cielings

actual front end outer dimensions are approximately 24 5/8" width X 27 5/8" height

875" width X 20" height

actual front end outer dimensions are approximately 32 5/8" width X 18 5/8" height -

40"W X 16"H [Duct Opening] ALUMINUM RETURN GRILLE - Easy Air Flow - Linear Bar Grilles [Outer Dimensions: 41.875"W X 17.875"H] 18" Diameter These are specially sized to+ Product Details Size 40"w X 16"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 41. 875" width X 17. 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