6" x 22" or 22" x 6" Cube Core Eggcrate Return Air Grille Return Grille Measure the size of the

Measure the size of the air duct/drywall opening

+ Product Details Size - 28"w X 16"h is the size for the duct opening measurement only

With its compact size and high-quality materials

this thermostat guard combines dependable security with a professional and attractive appearance

6" x 22" or 22" x 6" Cube Core Eggcrate Return Air Grille Return Grille Measure the size of the+ Product Details Size 6" x 22" or 22" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 75" X 23. 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