This Honeywell compatible F57A replacement washable pre filter was specifically designed to be compatible with the F57A Series. Once this filter has accumulated a sizable amount of dust, pollen and various other airborne hazards, you'll have the option of simply washing the filter instead of discarding it and replacing it with another.
Approximately 21-3/8" x 25" x 7/8"
Honeywell F57A Series
Other Manufacturer Part Numbers: 195910, A61254