28" x 34" or 34" x 28" Cube Core Eggcrate Return Air Grille w34h34 We carry sizes the big

We carry sizes the big box stores don't

Actual Filter Size – 33 3/4"w x 27 3/4" x 1"

With a 6" diameter for the duct opening measurement

actual front end outer dimensions are approximately 34 5/8" width X 8 5/8" height

actual front end outer dimensions are approximately 22 5/8" width X 12 5/8" height

28" x 34" or 34" x 28" Cube Core Eggcrate Return Air Grille w34h34 We carry sizes the big+ Product Details Size 28" x 34" or 34" x 28" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 29. 75" X 35. 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