22" x 30" or 30" x 22" Cube Core Eggcrate Return Air Grille Insulated Line Design – Heavier gauge than

Design – Heavier gauge than needed

Actual Filter Size – 31 3/4"w x 25 3/4" x 1"

Actual Filter Size – 29 3/4"w x 17 3/4" x 1"

The permanently attached eight-tumbler lock with a supplied key adds an extra layer of security

+ Product Details Size – 50"w X 20"h is the size for the duct opening measurement only

22" x 30" or 30" x 22" Cube Core Eggcrate Return Air Grille Insulated Line Design – Heavier gauge than+ Product Details Size 22" x 30" or 30" x 22" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 23. 75" X 31. 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