10" X 25" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 12 5/8" X 27 5/8"] 4" Diameter + Product Details Size -

+ Product Details Size - 20"w X 24"h is the size for the duct opening measurement only

+ Product Details Size - 6"w X 6"h is the size for the duct opening measurement only

+ Product Details Size & Compatibility – The 6" stick-on Side take-off is compatible with duct 6"

3 * insulation density is 30kgs/cbm = 0

10" X 25" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 12 5/8" X 27 5/8"] 4" Diameter + Product Details Size -+ Product Details Size 10"w X 25"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 12 5 8" width X 27 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