12" X 8" Baseboard Return Air Grille - HVAC Vent Duct Cover - 7/8" Margin Turnback For Flush Fit With Baseboard Work - White Copper Coil-Insulated Line Set with an additional 1 7/8"

with an additional 1 7/8" width and 2" height

+ Product Details Size - 25"w X 18"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 18 5/8" width X 22 5/8" height

+ Product Description Introducing the 2-coned supply grille for a T-bar lay-in

+ Product Details Size - 10"w X 30"h is the size for the duct opening measurement only

12" X 8" Baseboard Return Air Grille - HVAC Vent Duct Cover - 7/8" Margin Turnback For Flush Fit With Baseboard Work - White Copper Coil-Insulated Line Set with an additional 1 7/8"+ Product Details Size 12"w X 8"h Is The Size For The Duct Opening Measurement Only, Actual Front End Outer Dimensions Are 13. 75" Width X 9. 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