18" x 18" Cube Core Eggcrate Return Air Grille Adjustable Return box-shadow: 0 0 6px rgba(82

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Width vs Height:

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+ Product Details Size - 24"w X 12"h is the size for the duct opening measurement only

18" x 18" Cube Core Eggcrate Return Air Grille Adjustable Return box-shadow: 0 0 6px rgba(82+ Product Details Size 18"w X 18"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 75" width X 19. 75" height. High Quality High quality rust free, strong aluminum construction with smooth finished edges for easy and safe use; Filter Grille features a user friendly plastic latch that requires no screwdriver for opening. Installation Location sidewall and ceiling. Design Cubic core eggcrate