Resideo Honeywell 50000293-004 Air Cleaner Post-Filter, 20″ x 12-1/2″

Resideo Honeywell High Air Flow Post-Filter. This post-filter is 20" x 12-1/2". Sold 2 per pack. For use with Resideo Honeywell electronic air cleaner models F300A, F300E, F50F and F58F (will not fit F50A or F50E models). This item should be vacuumed out to clean but should NOT be washed. The plant states they will last 6 months but we have clients that use them for 12 months. Note: Resideo Honeywell has many series of these model numbers, so please measure your filter to make sure this is the correct one for your air cleaner.