24" x 28" or 28" x 24" Cube Core Eggcrate Return Air Grille fixed bar + Product Details Size –

+ Product Details Size – 8" x 8" is the size for the duct opening measurement only

75" width X 25

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

For 10" Round Duct Opening - Spiral or Flex

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

24" x 28" or 28" x 24" Cube Core Eggcrate Return Air Grille fixed bar + Product Details Size –+ Product Details Size 24" x 28" or 28" x 24" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 25. 75" X 29. 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