12" X 18" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES 12" Diameter while the included safety wire

while the included safety wire provides added security to prevent the door from falling off

Filter Grille features a user-friendly plastic latch that requires no screwdriver for opening

Easy Installation – Includes all necessary screws for quick and hassle-free setup

75"H – fits a 16" X 16" duct opening

Compatibility: Compatible with Duct 7"

12" X 18" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES 12" Diameter while the included safety wire+ Product Details Size 12"w X 18"h is the size for the duct opening measurement only, [Outer Dimensions: 14. 5"w X 20. 5"h] Actual Filter Size 11 3 4"w x 17 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,