30" x 32" or 32" x 30" Cube Core Eggcrate Return Air Grille Compatible with Duct 8" + Product Details Size -

+ Product Details Size - 36"w X 36"h X 2"d (for duct opening measurement only)

Actual Filter Size – 31 3/4"w x 35 3/4" x 1"

For 14" Round Duct Opening - Spiral or Flex

+ Product Details Size - 20"w X 36"h is the size for the duct opening measurement only

30" x 32" or 32" x 30" Cube Core Eggcrate Return Air Grille Compatible with Duct 8" + Product Details Size -+ Product Details Size 30" x 32" or 32" x 30" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 31. 75" X 33. 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