18" X 16" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES 6" Diameter and all locks open with

and all locks open with just one key

+ Product Details Size - 22"w X 16"h X 2"d (for duct opening measurement only)

Design – 29 Different Pockets - 11 External Pockets 12 Internal Pockets 6 Loops Plastic Base with Shoulder Strap - The sling loops are thick so you don't have to worry about them coming apart

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18" X 16" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES 6" Diameter and all locks open with+ Product Details + Product Details Size 18"w X 16"h is the size for the duct opening measurement only, [Outer Dimensions: 20. 5"w X 18. 5"h] Actual Filter Size 17 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