These are sturdy steel grilles made to fit a 24 x 16 inch hole (length x height). Grill has easy access filter compartment. Faceplate dimensions are 26 9/16 x 18 9/16.

Use this Return Air Filter Grille to cover a 24 x 24 inch hole. The steel design is sturdy enough for residential or commercial use. Faceplate dimensions are 26 9/16 x 26 9/16 inches.

The white steel 25 x 14 Return Air Filter Grill is perfect for hiding filters. Easy to open front for quickly switching. Find the 1 inch furnance type filters in your local stores. Outside dimensions are 27 9/16 x 16 9/16 inches.