28" X 28" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 30 5/8" X 30 5/8"] Powder-Coat + Product Details Size – LO246 Product Details Size 32 Compatible with Duct 4"

+ Product Details Size – 20"w X 26"h is the size for the duct opening measurement only

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

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

Easy Installation – Complete set of sponge gasket and mounting frame included

28" X 28" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 30 5 8" X 30 5 8"] Powder Coat + Product Details Size – LO246 Product Details Size 32 Compatible with Duct 4" + Product Details Size – 20"w X 26"h is the size for the duct opening measurement only + Product Details Size 30"w X 18"h is the size for the duct opening measurement only