BestAir Honeywell Pleated Air Filter, measuring 20"x25"x4" with a MERV 8 rating, effectively traps pollen, mold, bacteria, dust, and lint. Electrostatically charged, it lasts up to 1 year, ensuring cleaner air for your home. Compatible with Honeywell Air Cleaner Models F100B1032, F100B1040, F100F1087, F100F1095, F100F2044, F100F2051, F200E1037, 203720, F35/35R FC35A1027, F100/150 FC100A1037, F200 F200E1037, CF100A1025, CF100A1058, FC100A1037, FC200E1037, and POPUP2025. Actual Size: 19-3/4x24-3/4x4-1/4 Inch.