20" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 8in diameter + Product Details Size - Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size - 22"w X 16"h is the size for the duct opening measurement only

+ Product Details Size - 34"w X 30"h is the size for the duct opening measurement only

during winter

Each grille is carefully packaged with cardboard backing to prevent damage during shipment

Just run your finger along the edge of the top plate and you will find a smooth finished surface

20" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 8in diameter + Product Details Size Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size 22"w X 16"h is the size for the duct opening measurement only + Product Details Size 34"w X 30"h is the size for the duct opening measurement only