36" X 14" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES w40h40 + Product Details Size -

+ Product Details Size - 10"w X 8"h is the size for the duct opening measurement only

Design – Made of strong durable ABS plastic

made from durable galvanized steel metal to prevent rust and ensure long-lasting performance

+ Product Details Size – 36"w X 16"h is the size for the duct opening measurement only

Nominal 43% free area

36" X 14" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES w40h40 + Product Details Size -+ Product Details Size 36"w X 16"h is the size for the duct opening measurement only, [Outer Dimensions: 38. 5"w X 18. 5"h] Actual Filter Size 35 3 4"w x 15 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,