36" X 18" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 38 5/8" X 20 5/8"] Color_R-4.2 Yellow 4" X 10" Brass Victorian Outdoor Vent Covers BUFD10 FBA actual front end outer

4" X 10" Brass Victorian Floor Register Grille - Modern Contempo Decorative Grate - HVAC Vent Duct Cover - Brass Plated

but still very thin

+ Product Details Size – 6" x 24" or 24" x 6" is the size for the duct opening measurement only

height: 20px

Quality Packaging - Carefully Shrink Wrapped With Cardboard Backing To Prevent Damage In Shipment

36" X 18" Steel Return Air Filter Grille for 1" Filter Fixed Hinged [Outer Dimensions: 38 5 8" X 20 5 8"] Color_R 4.2 Yellow 4" X 10" Brass Victorian Outdoor Vent Covers BUFD10 FBA actual front end outer 4" X 10" Brass Victorian Floor Register Grille Modern Contempo Decorative Grate HVAC Vent Duct Cover Brass Plated but still very thin