The Honeywell 50000293-002 is the correct replacement for the following air cleaners:
The Honeywell 50000293-002 Post Filter for F50F & F300 is a two pack of replacement Honeywell filters that measure 16 inches by 12 1/2 inches. This Honeywell post filter contains a special antimicrobial coating that protects against the growth of bacteria and fungus on the filter. This Honeywell 50000293-002 filter should be replaced every 6 months.
The Honeywell 50000293-002 specifications: