34" x 36" or 36" x 34" Cube Core Eggcrate Return Air Grille Material_Steel and smooth surface

and smooth surface

Actual Filter Size – 25 3/4"w x 35 3/4" x 1"

+ Product Details Size - 28"w X 26"h is the size for the duct opening measurement only

Works for all Air Conditioning applications including Ductless Mini-Split

34" x 36" or 36" x 34" Cube Core Eggcrate Return Air Grille Material_Steel and smooth surface+ Product Details Size 34" x 36" or 36" x 34" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 35. 75" X 37. 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