20" x 24" or 24" x 20" Cube Core Eggcrate Return Air Grille w18h18 + Product Details Size - Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size - 20"w X 18"h is the size for the duct opening measurement only

+ Product Details Size – 12" x 14" or 14" x 12" is the size for the duct opening measurement only

Do not measure the overall size of the register itself

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20" x 24" or 24" x 20" Cube Core Eggcrate Return Air Grille w18h18 + Product Details Size Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size 20"w X 18"h is the size for the duct opening measurement only + Product Details Size – 12" x 14" or 14" x 12" is the size for the duct opening measurement only