12" x 16" or 16" x 12" Cube Core Eggcrate Return Air Grille 12" Round Duct Pipe Actual Filter Size – 9

Actual Filter Size – 9 3/4"w x 33 3/4" x 1"

actual front end outer dimensions are approximately 8

Adjust the airflow to your preference by simply opening or closing the top panel

10" x 3" Decorative Wood Air Vent HVAC Duct Cover Grille - Polished Finish Red Oak Wood - 2-Way Air Direction

12" x 16" or 16" x 12" Cube Core Eggcrate Return Air Grille 12" Round Duct Pipe Actual Filter Size – 9+ 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