16" X 30" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES Black actual front end outer dimensions

actual front end outer dimensions are approximately 28 5/8" width X 14 5/8" height

Crafted from durable galvanized steel metal to prevent rust and ensure long-lasting durability

extreme heat and sunlight

But for plumbing it will fit onto a pipe that is 1/4" on the "inside" (ID) which equals to 1/2 on the outside

16" X 30" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES Black actual front end outer dimensions+ Product Details Size 16"w X 30"h is the size for the duct opening measurement only, [Outer Dimensions: 18. 5"w X 32. 5"h] Actual Filter Size 15 3 4"w x 29 3 4" x 1" High Quality High quality rust free, strong aluminum construction with smooth finished edges for easy and safe use; Filter grille features a user friendly plastic latch that requires no screwdriver for opening. Installation Location Sidewall and ceiling. Design Heavier gauge than needed,