16" X 12" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES Blade Actual Front End Outer Dimensions

Actual Front End Outer Dimensions Are 16" Width X 5" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

+ Product Details Perfect Fit & Easy Sizing - Designed for a 26" x 36" OR 36" x 26" duct opening (measured at the opening)

these heavy-duty louvers are ideal for use in attics

+ Product Details Size – Stick-on collar is 14" and it is compatible with duct 14"

16" X 12" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES Blade Actual Front End Outer Dimensions+ Product Details Size 16"w X 12"h is the size for the duct opening measurement only, [Outer Dimensions: 18. 5"w X 14. 5"h] Actual Filter Size 15 3 4"w x 11 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,