30" X 6" Baseboard Return Air Grille - HVAC Vent Duct Cover - 7/8" Margin Turnback For Flush Fit With Baseboard Work - White Material_Steel + Product Details Size -

+ Product Details Size - 40"w X 6"h is the size for the duct opening measurement only

+ Product Details Size - 20"w X 14"h is the size for the duct opening measurement only

[Outer Dimensions: 18

crafted from heavy gauge steel for unparalleled durability

+ Product Details Size – 15" Wooden Corner Baseboard Grille

30" X 6" Baseboard Return Air Grille - HVAC Vent Duct Cover - 7/8" Margin Turnback For Flush Fit With Baseboard Work - White Material_Steel + Product Details Size -+ Product Details Size 30"w X 6"h Is The Size For The Duct Opening Measurement Only, Actual Front End Outer Dimensions Are 31. 75" Width X 7. 75" Height SEE BELOW IN DESCRIPTION How To Measure A Grille Powder Coat Finish Smooth, shiny, scratch resistant, beautiful. Looks like it was just waxed. High Quality Easy unrestricted airflow for your HVAC system 7 8" margin turnback. Carefully Shrink Wrapped With cardboard backing to prevent damage in shipment