8" x 26" or 26" x 8" Cube Core Eggcrate Return Air Grille w20h20 + Product Details Size –

+ Product Details Size – 12" x 16" or 16" x 12" is the size for the duct opening measurement only

With a solid base for stability

actual front end outer dimensions are approximately 20 5/8" width X 32 5/8" height -

+ Product Details Size – 6" x 30" or 30" x 6" is the size for the duct opening measurement only

+ Product Details Size - 16"w X 18"h is the size for the duct opening measurement only

8" x 26" or 26" x 8" Cube Core Eggcrate Return Air Grille w20h20 + Product Details Size –+ Product Details Size 8" x 26" or 26" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" X 27. 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