18" X 28" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 20 5/8" X 30 5/8"] Adjustable Return actual front end outer dimensions

actual front end outer dimensions are approximately 22 5/8" width X 22 5/8" height

+ Product Details Size – 32"w X 24"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 42 5/8" width X 12 5/8" height -

High Quality – Solid rigid steel body for durability and reliability with dampers operable by switch for airflow directional control

actual front end outer dimensions are approximately 18 5/8" width X 8 5/8" height -

18" X 28" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 20 5/8" X 30 5/8"] Adjustable Return actual front end outer dimensions+ Product Details Size 18"w X 28"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 20 5 8" width X 30 5 8" height Actual Filter Size 17 3 4"w x 27 3 4" x 1" 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.