16" x 18" or 18" x 16" Cube Core Eggcrate Return Air Grille Color_Red Oak Wood 75" width X 19

75" width X 19

this grille seamlessly drops into the designated place

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Actual Filter Size – 31 3/4"w x 17 3/4" x 1"

preventing tampering and maintaining consistent temperature settings

16" x 18" or 18" x 16" Cube Core Eggcrate Return Air Grille Color_Red Oak Wood 75" width X 19+ Product Details Size 16" x 18" or 18" x 16" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 75" X 19. 75". High Quality High quality, rust free aluminum construction with smooth finished edges and counter sunk screw holes (screws included); no sharp edges.. Installation Location sidewall and ceiling. Design Cubic core eggcrate design Offers highest airflow efficiency at almost 95%, reducing