12" x 26" or 26" x 12" Cube Core Eggcrate Return Air Grille 18" Round Duct Pipe the actual front end outer

the actual front end outer dimensions are 6" in diameter

+ Product Details Size – 14" X 4" is the size for the duct opening (floor/vent hole) measurement only

High Quality Aluminum – The premium durable aluminum will never rust and it will never wear through leaving the material with an elegant

with actual outer dimensions of 8

actual front end outer dimensions are approximately 28 5/8" width X 26 5/8" height

12" x 26" or 26" x 12" Cube Core Eggcrate Return Air Grille 18" Round Duct Pipe the actual front end outer+ Product Details Size 12" x 26" or 26" x 12" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 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