12" x 16" or 16" x 12" Cube Core Eggcrate Return Air Grille 12" Round Duct Pipe + Product Details Size -

+ Product Details Size - 4"w X 28"h is the size for the duct opening measurement only

Can be hooked up with our Butterfly Dampersfor precise airflow control

actual front end outer dimensions are approximately 8

actual front end outer dimensions are 22" width X 6" height

12" x 16" or 16" x 12" Cube Core Eggcrate Return Air Grille 12" Round Duct Pipe + Product Details Size -+ Product Details Size 12" x 16" or 16" x 12" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 75" X 17. 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