20" X 30" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIR FLOW - LINEAR BAR GRILLES Aluminum Bar + Product Details Size &

+ Product Details Size & Compatibility – The size of galvanized sheet metal straight floor boot is 10" X 6" X 4"

We use special materials To prevent corrosion

Carefully Shrink Wrapped With Cardboard Backing To Prevent Damage In Shipment

All Our Filter Are Tested Per ASHRAE-52

20" X 30" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIR FLOW - LINEAR BAR GRILLES Aluminum Bar + Product Details Size &+ Product Details Size 20"w X 30"h is the size for the duct opening measurement only, [Outer Dimensions: 22. 5"w X 32. 5"h] Actual Filter Size 19 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,