6" x 22" or 22" x 6" Cube Core Eggcrate Return Air Grille Material_Steel Actual Filter Size – 13

Actual Filter Size – 13 3/4"w x 13 3/4" x 1"

+ Product Details Size - 36"w X 36"h is the size for the duct opening measurement only

+ Product Details Size - 22"w X 4"h is the size for the duct opening measurement only

this grille seamlessly drops into the designated place

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 16" or 16" x 12" duct opening (measured at the opening)

6" x 22" or 22" x 6" Cube Core Eggcrate Return Air Grille Material_Steel Actual Filter Size – 13+ 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