30" X 18" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 32 5/8" X 20 5/8"] w20h20 9% Pure Copper meeting ASTM

9% Pure Copper meeting ASTM B280 standards

+ Product Details Size - The listed 5" diameter refers specifically to the size of the duct opening

+ Product Details Size – 6" x 30" or 30" x 6" is the size for the duct opening measurement only

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

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30" X 18" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 32 5/8" X 20 5/8"] w20h20 9% Pure Copper meeting ASTM+ Product Details Size 30"w X 18"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 32 5 8" width X 20 5 8" height High Quality High quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Installation Location Ceiling Design Fixed hinged for easy filter change & cleaning uses a 1" thick filter. Our filter grille latch is easy to use on your fingers and