24" X 18 Steel Return Air Filter Grille for 1" Filter - Removable Face/Door - HVAC DUCT COVER - Flat Stamped Face - White 24"w X 18"h Is The Size For The Duct Opening Measurement Only, Actual Front End Outer Dimensions Are 26.5" Width X 20.5" Height - SEE BELOW IN DESCRIPTION HOW TO MEASURE A GRILLE High Quality Solid Stamped steel with Counter-Sunk Screw Holes (Screws Included) and No Sharp Edges Our Filter Grille Latch is Easy To Use On Your Fungers And Requires No Screwdriver To Open. Removable Door/Face For Easy Filter Change & Cleaning - Uses a 1" Thick Filter Powder-Coat Finish - Smooth, Shiny, Scratch-Resistant, Beautiful. Looks Like It Was Just Waxed