36" X 20" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 38 5/8" X 22 5/8"] Insulated Line Set Efficient Airflow Design: The slots

Efficient Airflow Design: The slots are meticulously angled to diversify airflow in two directions

+ Product Details Size - 16"w X 16"h is the size for the duct opening measurement only

[Outer Dimensions: 18

+ Product Details Size - 10"w X 8"h is the size for the duct opening measurement only

+ Product Details Size – 16"w X 24"h is the size for the duct opening measurement only

36" X 20" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 38 5/8" X 22 5/8"] Insulated Line Set Efficient Airflow Design: The slots+ Product Details Size 36"w X 20"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 38 5 8" width X 22 5 8" height High Quality high quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Installation Location sidewall and ceiling Design removable door face for easy filter change & cleaning uses a 1" thick filter. Our filter grille latch is easy to use on