25" X 16" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 27 5/8" X 18 5/8"] w34h34 please note that the total

please note that the total outer dimensions of the grille measure 8" in diameter

+ Product Details Size - 28"w X 4"h is the size for the duct opening measurement only

Insulation density is 30kgs/cbm = 0

+ Product Details Size - 10"w X 24"h is the size for the duct opening measurement only

+ Product Details Size – 12"w X 12"h is the size for the duct opening measurement only

25" X 16" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 27 5/8" X 18 5/8"] w34h34 please note that the total+ Product Details Size 25"w X 16"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 27 5 8" width X 18 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