20" x 30" or 30" x 20" Cube Core Eggcrate Return Air Grille RV Mobile Home + Product Details Size –

+ Product Details Size – 8"w X 6"h is the size for the duct opening measurement only

Actual Filter Size – 13 3/4"w x 19 3/4" x 1"

actual front end outer dimensions are approximately 16 5/8" width X 24 5/8" height

Actual Filter Size – 33 3/4"w x 11 3/4" x 1"

High Quality – high-quality steel with counter-sunk screw holes (screws included) and no sharp edges

20" x 30" or 30" x 20" Cube Core Eggcrate Return Air Grille RV Mobile Home + Product Details Size –+ Product Details Size 20" x 30" or 30" x 20" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 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