6" x 36" or 36" x 6" Cube Core Eggcrate Return Air Grille Aluminum Bar + Product Details Size –

+ Product Details Size – 32"w X 24"h is the size for the duct opening measurement only

3 * Insulation density is 30kgs/CBM = 0

Actual Filter Size – 29 3/4"w x 5 3/4" x 1"

+ Product Details 12"w X 4"h Is The Size For The Duct Opening Measurement Only

6" x 36" or 36" x 6" Cube Core Eggcrate Return Air Grille Aluminum Bar + Product Details Size –+ Product Details Size 6" x 36" or 36" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 75" X 37. 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