24" X 6" Baseboard Return Air Grille - HVAC Vent Duct Cover - 7/8" Margin Turnback For Flush Fit With Baseboard Work - White 14in diameter + Product Details Size –

+ Product Details Size – 18"w X 30"h is the size for the duct opening measurement only

Actual Filter Size – 31 3/4"w x 29 3/4" x 1"

Design – Re-configurable/Interchangeable Sections – Easily convertible into 1-Way

+ Product Details Size - 14"w X 24"h X 2"d (for duct opening measurement only)

24" X 6" Baseboard Return Air Grille - HVAC Vent Duct Cover - 7/8" Margin Turnback For Flush Fit With Baseboard Work - White 14in diameter + Product Details Size –+ Product Details Size 24"w X 6"h Is The Size For The Duct Opening Measurement Only, Actual Front End Outer Dimensions Are 25. 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