18" X 36" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 20 5/8" X 38 5/8"] Insulated Line Set + Product Details Size -

+ Product Details Size - 12"w X 22"h is the size for the duct opening measurement only

Tough reinforced metallized polyester jacket - tear and puncture resistant

+ Product Details Size - 25"w X 8"h is the size for the duct opening measurement only

this grill will provide the design aesthetic you're looking for

+ Product Details Size – 10" X 2" is the size for the duct opening (floor/vent hole) measurement only

18" X 36" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 20 5/8" X 38 5/8"] Insulated Line Set + Product Details Size -+ Product Details Size 18"w X 36"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 20 5 8" width X 338 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