16" x 30" or 30" x 16" Cube Core Eggcrate Return Air Grille Compatible with Duct 8" /* Adding space between bullet

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+ Product Details Size – 34"w X 14"h is the size for the duct opening measurement only

High Quality – high quality solid stamped steel with counter-sunk screw holes (screws included) and no sharp edges

+ Product Details Size - 10"w X 16"h is the size for the duct opening measurement only

16" x 30" or 30" x 16" Cube Core Eggcrate Return Air Grille Compatible with Duct 8" /* Adding space between bullet+ Product Details Size 16" x 30" or 30" x 16" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 75" X 31. 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